AN ISO/IEC - 17025 STANDARD - NABL ACCREDITATION LABORATORY / TRAINING AND CERTIFICATION - MECH - CIVIL - ELECTRICAL & IT COURSES / A to Z LABORATORY TESTING SERVICES / INSPECTION SERVICES / ALL ENGINEERING CONTRACTORS / MORE THAN 1500 SERVICES ...

AIR LEAK TESTING SERVICES & TRAINING
 
 

 

What is Air Leakage?
 
  • Air leakage is the unwanted flow of air through the wall of a vessel or sealed container. Pressure variation from the inside of the vessel to the atmosphere outside the vessel cause the air to flow from higher pressure to lower pressure areas. Air leakage generally occurs from the inside out—from inside an object (higher pressure) to outside the object (lower pressure)— but can also happen from the outside in when ambient atmosphere flows into an evacuated (vacuum) vessel.
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    What is Air Leak Testing?
     
  • Air leak testing is an effective method of determining if a product has been manufactured to meet leak-tight specifications. Microscopic holes, failed seals, and countless other defects can cause air leaks that can lead to significant problems. Everything from automotive radiators to medical devices to sprinkler system components requires air leak testing to ensure proper and safe operation.
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  • In general, air leak testing is clean, non-destructive, and highly repeatable. Air leak tests can be performed on any product that requires air-tight or water-tight construction. It is used not only to detect leaks, but also to provide non-subjective data on leakage rates for further analysis. Air leak testing helps OEMs ensure that their products meet the required leak-tight specifications and helps them find and eliminate design and/or manufacturing flaws.
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    Air Leak Testing Methods
     
    Bubble Test/Submersion Test
     
  • Perhaps the most basic air leak testing method, bubble testing involves pressurizing the part or vessel, submerging it in water, and watching for bubbles caused by escaping air/gas. The size of the leak is directly proportional to the intensity and size of the bubbles created. While submersion testing is effective for locating leaks, it is not effective for accurately measuring or quantifying a leak.
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    Ultrasonic Measurement
     
  • Every leak creates some sort of sound, and the frequency of that sound can be higher or lower depending on the size of the leak. The smaller the leak, the higher the frequency—in many cases, fine leaks emit sound at a frequency that is too high for the human ear to hear. Ultrasonic leak detectors are, most often, handheld devices that are paired with headphones, an adjustable meter, and accompanying computer software; other accessories may be used for certain applications. Ultrasonic measurement can generally detect leaks up to 10-2 scc/s, making them best suited to finding “larger” small leaks, but not very fine leaks. Additionally, these devices cannot actually measure the leak rate, but only provide an estimate based on the frequency of the sound.
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    Pressure Decay Testing
     
  • Pressure decay air leak testing monitors the internal pressure of a sealed part or vessel. The vessel is first pressurized to a predetermined level, usually with dry air or nitrogen, then monitored for set amount of time; any decrease in pressure indicates a leak. The sensitivity of pressure decay testing depends on the total volume of the part being tested, as well as the test time and the resolution of the pressure transducer. In general, this air leak testing method is easier to use than many other processes for leak rates as low as 10-2 scc/s. However, it can be susceptible to environmental and mechanical instability.
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    Vacuum Decay Testing
     
  • Vacuum decay testing is essentially the opposite of pressure decay testing. Instead of pressurizing the part or vessel, it is evacuated and monitored for any increase in pressure caused by test media entering the part. Vacuum decay air leak testing is more sensitive and precise than pressure decay testing, and is less affected by temperature changes or other environmental factors. However, the pressure difference applied to the part during test cannot be greater than 14.7 psiv. Vacuum decay testing may also be susceptible to liquid evaporation and surface outgassing, which can affect and limit sensitivity as traces of humidity/evaporation may increase internal pressure and create a false leak.
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    Helium Sniff Testing
     
  • In helium sniff testing, the part or vessel is pressurized with helium to a predetermined level, then scanned across its surface with a helium sniffer device. Any leak in the vessel will cause an increase in helium concentration at the point of the leak, which will be detected by the sniffer. Helium sniff testing not only locates the leak point, it is also highly sensitive (down to 10-5 scc/s). However, as it generally requires manual operation, it offers slower throughput than some other air leak testing methods, and its effectiveness is limited in environments where background air flow reduces the concentration of tracer gas or in areas where there is a high concentration of helium near the test site.
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    Helium Spray Testing
     
  • For helium spray testing, the part or vessel is evacuated using a pumping system with an integrated helium detector. Any gross leak will prevent the vessel from reaching vacuum. If vacuum is reached successfully, the part is then sprayed with helium; any fine leak will pull helium into the evacuated part. The helium detector will sense the helium and measure the leak rate. Helium spray air leak testing can accurately locate a leak and is highly sensitive (down to 10-6 scc/s). However, multiple leaks may be “masked” if they are located too close to each other, and throughput is generally low.
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    Helium Accumulation Testing
     
  • This air leak testing method starts with the part or vessel inside a sealed enclosure and connected to a pump (or pumps) and a helium sensing device. The vessel is evacuated; if vacuum cannot be reached, a gross leak is present. Once vacuum is achieved, the part is pressurized with helium to a predetermined level. The ambient air within the chamber is continuously mixed via blowers/fans to guarantee uniform air concentration. After a set length of time, air samples are pumped through the helium sensor, which monitors the helium pressure to detect any increase from the initial atmospheric level—any pressure change indicates a leak in the part. Helium accumulation air leak testing offers good sensitivity (down to 10-3 mbar l/s, depending on enclosure size), high reliability, and good repeatability, and is not susceptible to temperature.
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    Nitrogen Purge Testing
     
  • CTS’ patented nitrogen purge testing instrument is a localized, sniffer-style tester with superior background control that reduces the chances of false leak failures. Utilizing low pressure nitrogen, the system creates a helium-free environment for the mass spectrometer gas analyzer to sample and detect micro-leaks. Our nitrogen purge testing technology can detect leaks as low as 10-6 scc/s.
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    Hard Vacuum Testing
     
  • In hard vacuum leak testing, a part or vessel is placed inside a sealed chamber. A vacuum pump removes all the atmosphere from the chamber and the part; the part is then filled with tracer gas, such as helium. The mass spectrometer then samples the air inside the test chamber for tracer gas escaping the part. Vacuum testing is extremely sensitive (down to 10-8 scc/s), highly repeatable, and provides reliable and quantifiable results. It can be fully automated and integrated into a production line for fast throughput. This is, however, perhaps the most expensive air leak testing method available.
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    pressure Testing Equipment:
     
  • Pressure gauges [1.5 to 4.0 times of test pressure]
  • Water tanks
  • Potable tanks
  • umps for water filling and pressure
  • Pressure gauges and temperature recorder
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    pressure Testing services
     
  • Pipeline Pressure testing
  • hydraulic pressure testing
  • Oil Leak testing
  • Pneumatic Pressure Testing
  • air Leak testing
  • Hydro Static Pressure Testing
  • Oil Leak testing
  • Api spec 6a pr1 Testing
  • Api spec 6a pr2 Testing
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    Pipeline Pressure Testing Services
     
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    PWHT SERVICES
     
    post weld heat treatment in english-bazar , post weld heat treatment services in english-bazar , pwht services in english-bazar , pwht for piping in english-bazar , pwht for pressure vessels in english-bazar , pwht for structural steel expansion in english-bazar , oil and gas combustion heating pwht for pressure vessels in english-bazar , induction stress relieving services in english-bazar , stress relieving services in english-bazar , oil pipeline stress relieving pwht services in english-bazar , gas pipeline stress relieving pwht services in english-bazar , chemical pipeline stress relieving pwht services in english-bazar , hydraulic pipeline stress relieving pwht services in english-bazar , stream pipeline stress relieving pwht services in english-bazar , cross country pipeline stress relieving pwht services in english-bazar , interconnection pipelines of reaction vessels pwht services in english-bazar , pneumatic powder conveying pipeline stress relieving pwht services in english-bazar ...
     
    list of our services following cities
     
    bankura | barddhaman (burdwan) | birbhum | dakshin dinajpur | darjiling (darjeeling) | haora (howrah) | hugli (hooghly) | jalpaiguri | koch bihar (cooch behar) | kolkata | maldah | murshidabad | nadia | north twenty four parganas | paschim medinipur | purba medinipur | puruliya (purulia) | south twenty four parganas | uttar dinajpur | west bengal | abhirampur | adra | ahmadpur | aiho | aistala | ajodhya nagar | ajodhyanagar | alikhoja | alipukur | alipur | alipur | alipur (alipore) | alipurduar | alipurduar railway junction | amalhara | amarshi kasba | ambhua | amkula | amlagora | amlajora | amodghata | amta | amtala | anantabati | anantapur | anarbaria | andal (gram) | andul | ankurhati | anulia | anup nagar | arambag | argari | arjunpur | arra | arra | asansol | ashadtalya | ashokenagar kalyangarh (ashoknagar) | asuti | aurangabad | babanpur | bablari dewanganj | badamtam tea garden | badhagachhi | badkulla | baduria | bagbari | bagnan | bagula | baharu | bahir sarbamangala | bahula | baidyabati | baidyanathpur | bairatisal | baisguri | baksa | baksinagar | baktarnagar | balarambati | balarampota | balarampur | balarampur | baliadanga | balibhara | balichak | balihati | ballavpur | bally | bally | baluhati | balurghat | bamangachhi | bamangram | bamanpukur | bamna | bamunara | bamunari | banagram | banarhat tea garden | bandhail | bandipur | bandoan | baneshwarpur | baneswar | bangalpur | bangsidharpur m p | ban harishpur | baniara | baniban | baniban jagadishpur | banjetia | bankra | bankra | bankul | bankura | bansberia | banshra | banshra | banupur | bara | bara bamonia | barabazar | bara jumla | bara mohansingh | baranagar | barasat | bara suzapur | barda | barddhaman (bardhaman) | bargachhia | bargachhia | barijhati | barijpur | barjora | barkalikapur | barrackpore | barrackpur cantonment | barua | barua gopalpur | baruihuda | baruipara | baruipur | baruipur (p) | barunda | basai | basantapur | basanti | basantia | basina | basirhat | baska | basudebpur | basudebpur | batika | batul | bayarsing | begampur | begari | begun kodar | beharia | beldanga | beldubi | belebathan | belgharia | beliatore | belumilki | benia gram | benjanhari acharial | benudia | berandari bagaria | berhampore (baharampur) | betpuli | bhabki | bhadreswar | bhagabatipur | bhandardaha | bhandar gachha | bhangar raghunathpur | bhangri pratham khanda | bhanowara | bhasa | bhasaipaikar | bhatenda | bhatpara | bhimram | bholar dabri | bidhannagar | bidyadharpur | bikihakola | bilandapur | bilkanda | bilpahari | binnaguri | bipra noapara | bira | birlapur | birnagar | birodhi | birpara | bishnupur | bishnupur | bishnupur | bishnupur | bolpur | bongaon (bangaon) | bora gagangohalia | borai | bowali | brindabanpur | budbud | budge budge | buita | cart road | chachanda | chak alampur | chakapara | chak bankola | chak banshberia (chak bansberia) | chak barbaria | chak baria | chak bhrigu | chakchaka | chakdaha | chak enayetnagar | chakiabhita | chak kanthalia | chak kashipur | chakmeghoan | chalsa mahabari | chaltia | champahati | champdani | chamrail | chanchal | chandannagar | chandapur champagachhi | chanddandaha | chandipur | chandpala anantapathpur | chandpara | chandpur | chandpur m | chandrakona | chandrapur | chandrapur | chandrapur | chanduria | chapari | chapra | chapui | char brahmanagar | charka | char maijdia | chaspara | chata kalikapur | chatta baria | chaulia | chechakhata | chekya | chelad | chhatianmor | chhekati | chhora | chhota laukuthi | chhota suzapur | chikanpara | chikrand | chinchuria | chittaranjan | chong ghurali | chongtong tea garden | chopra | contai | cooper's camp | dabgram | dafahat | dafarpur | dafarpur | dainhat | dakhin rampur | dakra | dakshin bagdogra | dakshin baguan | dakshin chatra | dakshin jhapardaha | dakshin khagrabari | dakshin khanda | dakshin odlabari | dakshin rajyadharpur | dakshin raypur | dakshin santoshpur | dalkhola | dalurband | dandirhat | danga | dankuni | darappur | darjiling (darjeeling) | daulatpur | deara | debipur | debipur | deora | deora | deulgram | deuli | deulia | deulpur | dhakuria | dhaliabari | dhamua | dhania | dhanyakuria | dharmapur | dhatrigram | dhola | dhuilya | dhulagari | dhulasimla | dhulian | dhunki | dhupguri | dhusaripara | diamond harbour | digha | digha | dighirpar | dignala | dihi kalas | dihimandalghat | dinga khola | dinhata | dogachhia | domjur | domohani | donalia | dubra | dubrajpur | dudhkalmi | dum dum | dumriguri | dungra khasmahal | durganagar | durgapur | durllabhganj | dwari geria | egara | egra | ekabbarpur | eksara | english bazar | erashal | falakata | farakka barrage township | fatehpur | fatellapur | fatepur | gabberia | gadigachha | gairkata | gangadharpur | gangadharpur | gangapur | gangarampur | gangnapur | gangni | gangpur | ganye gangadharpur | garalgachha | garbeta | garh kamalpur | garia | garshyamnagar | garulia | gaur daha | gayespur | geni | ghatal | ghola noapara | ghoraberia | ghoralia | ghorsala | ghosal chak | ghuni | ghutgarya | ging tea garden | giria | goaljan | goasafat | gobardanga | gobindapur | goda | gondalpara | gopalpur | gopalpur | gopalpur | gopinathpur | gopjan | gora bazar | guma | guriahati | guskara | habra | hafania | halalpur krishnapur | haldia | haldibari | halisahar | halyan | hansghara | hanskunda | hanspukuria | haora (howrah) | harharia chak | haridasmati | hariharpur | harinadibhastsala | harindanga | haringhata farm | haripur | harirampur | harishpur | hasimnagar | hatgachha | hatsimla | hijuli | hijuli | hincha gerya | hindusthan cables town (rupnarainpur) | hingalganj | hirapur | hugli-chinsurah (hugli-chuchura) | hutmura | ichhapur (ichapore) | ichhapur defence estate | ichhlampur | ilambazar | islampur | islampur | itahar | itinda | jadupur | jafarpur | jafrabad | jagadanandapur | jagadishpur | jagannathpur | jagatballavpur | jagatnagar | jagijhora barabak | jagtaj | jala kendua | jalalpur | jallabad | jalpaiguri | jaluidanga | jamuria | janai | jangal | jangalpara | jangipur | jateshwar | jatragachhi | jaygaon (jaigaon) | jaykrishnapur | jaykrishnapur | jaynagar | jaynagar mazilpur | jaypur | jaypur bil | jemari (j.k. nagar township) | jetia | jhalda | jhalda | jhangra | jhanti pahari | jhargram | jhorhat | jiaganj-azimganj | jirat | jitu | joka | jot kamal | joypul | jujarsaha | kachu pukur | kaijuri | kajora | kakdihi | kakramari | kalaikunda | kalara | kalaria | kaliaganj | kalikapota | kalikapur | kalikapur barasat | kalimpong | kalipur | kalkut | kalna | kalua | kalyani | kalyanpur | kamalapur | kamarhati | kamat phulbari | kamgachhi | kamranga | kanaipur | kanaipur | kanchrapara | kandi | kanganbaria | kanki | kanksa | kankuria | kanpur | kantaberia | kantaranguri | kantlia | kanyanagar | kapashanria | karari chandpur | karia | karidhya | karimpur | kasba | kashimnagar | kasim bazar (cossimbazar) | katwa | kaugachhi | kenda | kendra khottamdi | kendua | kendua | keota | kesabpur | khadalgobra | khadinan | khagrabari | khajutti | khalia | khalisani | khalor | khandra | khanpur | khantora | kharagpur | kharagpur railway settlement | kharar | khardah | kharia | kharibari | kharimala khagrabari | kharisha | kharsarai | khasjalalsi | khatra | khidirpur (kidderpore) | khodarampur | khodar bazar | khorddabamonia | koch bihar (cooch behar) | kodalia | kohetpur | kokapur | kola | kolaghat | kolkata [calcutta] | komarhat | konardihi | konnagar | kotbar | kotulpur | koyra | kriparampur | krishna chandrapur | krishnanagar | krishnapur | krishnapur | krishna sali | kshidirpur | kshirpai (khirpai) | kulberia | kuldanga | kulia | kulihanda | kulitapara | kulti | kumirmora | kunustara | kurseong | kusadanga | labhpur | lagda | lalman | lalpur | lalpur | lapara | laskarpara | lataguri | ledisol | madanpur | madhusudanpur | madhyamgram | madna | magrahat | mahadeb nagar | mahal | mahendrapur | maheshtala | mahiari | mahira | mahishrekha | mainaguri | majdia | majiara | makardaha | makhal tala | mal | mallik bagan | mallikpur | mamrejpur | manbazar | mandarbani | mangalbari | mangarjung tea garden (nagri) | manikpur | manirampur | mansinhapur | manushpur | maricha | masat | masat | masila | maslandapur | mathabhanga | mathapari | mathurapur | mathurapur | matialihat | matiari | matla | mechiabasti | medinipur (midnapore) | mekliganj (mekhliganj) | memari | mihitikri | milki | minakhan | mira | mirdhanga | mirik | mirjapur | mirzapur | mirzapur | mithipur | mohanpur | mohanpur | mugkalyan | muragachha | murarai | murgathaul | murshidabad | murulia | nababpur | nabadiganta industrial township | nabadwip | nabaghanapur | nabagram | nabagram colony | naba kola | nabghara | nabgram | nachhratpur katabari | nadabhanga | nagar changrabandha | nagdaha | nahazari | naihati | nainan | naiti | naldanga | nalhati | nalpur | namajgram | nandigram | nari | naridana | nasaratpur | nasibpur | nasra | natibpur | naul | naupala | nawapara (nuapada) | nayabahadurpur | nazirpur | nebadhai duttapukur | new barrackpore | nibra | nimpith | nimsa | nischintapur | noapara | nokpul | north barrackpore (north barrackpur) | north dumdum | nrisinghapur | oadipur | odlabari | old malda | ondal | osmanpur | osmanpur | pairagachha | palashban | palashi | palladaha | paltapara | panchghara | panchghara | panchla | panchpara | pandua | pangachhiya | paniara | panihati | panpara | panskura | panuhat | panuria | parangarpar | paranpara | parashkol | parasia | parbbatipur | par beliya | parota | par patiram | paschim bainan | paschimbhatjangla | paschim gazipur | paschim jitpur | paschim panchla | paschim punropara | pashchim khalna | patdaha | patharberia | patihal | patuli | patulia | petua | phulia | piarinagar | poali | podara | prayagpur | priyanagar | pujali | punglia | purba bishnupur m | purba ranaghat | purbba narayanpur | purbba tajpur (purba tajpur) | puruliya (purulia) | purusottampur | radhanagar | radhapur | raghabpur | raghabpur | raghudebbati | raghudebpur | raghunathchak | raghunathpur | raghunathpur | raghunathpur (ps-dankuni) | raghunathpur (ps-magra) | raigachhi | raiganj | raipur | raipur bazar | rajapur | rajarhat gopalpur | rajbalhat | rajnagar | rajpur sonarpur | ramakantapur | ramanathpur | ramchandrapur | ramchandrapur (in: thakurpukur mahestola subdistrict) | ramchandrapur (in: sonarpur subdistrict) | rameswarpur | ramjibanpur | ramkrishnapur | ramnagar | ramnagar | rampurhat | ranaghat | ranaghat | rangabhita | raniganj | ratibati | raynagar | rekjuani | rishra | rishra | rongmook ceder tea garden | rudrapur | ruiya | sadigachhi | sadpur | saguna | sahajadpur | sahapur | sahapur | sahebganj | sahebpur | sainthia | salap | salar | salipur | saltor | samali | samuktola | sangrampur | sankarpur | sankrail | sankrailjala | santaldih thermal power project-town | santipur (shantipur) | santoshpur | sarenga | sarpi | sashpur | satigachha | sehara | serampore | serpur | shankara | shankhanagar | shantipur | shashati | shibalaya | shilda | shimulpur | shuvararah | shyamdhan | shyampur | shyampur | sibdanga badarpur | sibnagar | siduli | silampur | siliguri | simhat | simla | simlapal | simurali | singtam tea garden | singur | sirakol | sirsha | sisha-jumrha | sobhaganj | solgohalia | sonada khasmahal | sonamukhi | sonatala | sonatikiri | sonda | south dumdum | srikantabati | srimantapur | sripur | srirampur | subarnapur | sukdal | sukhiapokhri | sulanggari | suri | surul | swangrampur | taherpur | takagach | taki | talbandha | taldi | tamluk | tarakeswar | tari | teghari | teghari | tehatta | teleni para | telipara tea garden d | tentulkuli | tiorkhali | tisa | titagarh | topsi | tufanganj | tulshighata | udang | ukhra | ula | uluberia | usthi | uttampur | uttar bagdogra | uttar bagundi | uttar bishnupur | uttar durgapur | uttar goara | uttar jhapardaha | uttar kalas | uttar kamakhyaguri | uttar kusum | uttar latabari | uttar madarihat | uttar mahammadpur | uttarpara kotrung | uttarparanij | uttar pirpur | uttar raypur | uttar satali ...
     
    list of our services following cities
     
    24 paraganas north | 24 paraganas south | alipurduar | bankura | birbhum | coochbehar | darjeeling | dinajpur dakshin | dinajpur uttar | hooghly | howrah | jalpaiguri | jhargram | kalimpong | kolkata | maldah | medinipur east | medinipur west | murshidabad | nadia | paschim bardhaman | purba bardhaman | purulia | agar malwa | alirajpur | anuppur | ashoknagar | balaghat | barwani | betul | bhind | bhopal | burhanpur | chhatarpur | chhindwara | damoh | datia | dewas | dhar | dindori | east nimar | guna | gwalior | harda | hoshangabad | indore | jabalpur | jhabua | katni | khargone | mandla | mandsaur | morena | narsinghpur | neemuch | niwari | panna | raisen | rajgarh | ratlam | rewa | sagar | satna | sehore | seoni | shahdol | shajapur | sheopur | shivpuri | sidhi | singrauli | tikamgarh | ujjain | umaria | vidisha | ariyalur | chengalpattu | chennai | coimbatore | cuddalore | dharmapuri | dindigul | erode | azamgarh | kallakurichi | kanchipuram | kanniyakumari | karur | krishnagiri | madurai | mayiladuthurai | nagapattinam | namakkal | perambalur | pudukkottai | ramanathapuram | ranipet | salem | sivaganga | tenkasi | thanjavur | theni | the nilgiris | thiruvallur | thiruvarur | tiruchirappalli | tirunelveli | tirupathur | tiruppur | tiruvannamalai | tuticorin | vellore | villupuram | virudhunagar | nicobars | north and middle andaman | south andamans | anantapur | chittoor | east godavari | guntur | krishna | kurnool | prakasam | spsr nellore | srikakulam | visakhapatanam | vizianagaram | west godavari | y.s.r. | anjaw | changlang | dibang valley | east kameng | east siang | kamle | kra daadi | kurung kumey | leparada | lohit | longding | lower dibang valley | lower siang | lower subansiri | namsai | pakke kessang | papum pare | shi yomi | siang | tawang | tirap | upper siang | upper subansiri | west kameng | west siang | baksa | barpeta | biswanath | bongaigaon | cachar | charaideo | chirang | kannur | darrang | dhemaji | dhubri | dibrugarh | dima hasao | goalpara | golaghat | hailakandi | hojai | jorhat | kamrup | kamrup metro | karbi anglong | karimganj | kokrajhar | lakhimpur | majuli | marigaon | nagaon | nalbari | sivasagar | sonitpur | south salmara mancachar | tinsukia | udalguri | west karbi anglong | araria | arwal | aurangabad | banka | begusarai | bhagalpur | bhojpur | buxar | darbhanga | gaya | gopalganj | jamui | jehanabad | kaimur (bhabua) | katihar | khagaria | kishanganj | lakhisarai | madhepura | madhubani | munger | muzaffarpur | nalanda | nawada | pashchim champaran | patna | purbi champaran | purnia | rohtas | saharsa | samastipur | saran | sheikhpura | sheohar | sitamarhi | siwan | supaul | vaishali | chandigarh | balod | baloda bazar | balrampur | bastar | bemetara | bijapur | bilaspur | dantewada | dhamtari | durg | gariyaband | gaurella pendra marwahi | janjgir-champa | jashpur | kabirdham | kanker | kondagaon | korba | korea | mahasamund | mungeli | narayanpur | raigarh | raipur | rajnandgaon | sukma | surajpur | surguja | central delhi | east delhi | new delhi | north delhi | north east delhi | north west delhi | shahdara | south delhi | south east delhi | south west delhi | west delhi | north goa | south goa | ahmadabad | amreli | anand | arvalli | banas kantha | bharuch | bhavnagar | botad | chhotaudepur | dang | devbhumi dwarka | dohad | gandhinagar | gir somnath | jamnagar | junagadh | kachchh | kheda | mahesana | mahisagar | morbi | narmada | navsari | panch mahals | patan | porbandar | rajkot | sabar kantha | surat | surendranagar | tapi | vadodara | valsad | ambala | bhiwani | charki dadri | faridabad | fatehabad | gurugram | hisar | jhajjar | jind | kaithal | karnal | kurukshetra | mahendragarh | nuh | palwal | panchkula | panipat | rewari | rohtak | sirsa | sonipat | yamunanagar | bilaspur | chamba | hamirpur | kangra | kinnaur | kullu | lahul and spiti | mandi | shimla | sirmaur | solan | una | anantnag | bandipora | baramulla | budgam | doda | ganderbal | jenglish-bazar | kathua | kishtwar | kulgam | kupwara | poonch | pulwama | kasaragod | rajouri | ramban | reasi | samba | shopian | srinagar | udhampur | bokaro | chatra | deoghar | dhanbad | dumka | east singhbum | garhwa | giridih | godda | gumla | hazaribagh | jamtara | khunti | koderma | latehar | lohardaga | pakur | palamu | ramgarh | ranchi | sahebganj | saraikela kharsawan | simdega | west singhbhum | bagalkote | ballari | belagavi | bengaluru rural | bengaluru urban | bidar | chamarajanagara | chikkaballapura | chikkamagaluru | chitradurga | dakshina kannada | davangere | dharwad | gadag | hassan | haveri | kalaburagi | kodagu | kolar | koppal | mandya | mysuru | raichur | ramanagara | shivamogga | tumakuru | udupi | uttara kannada | vijayapura | yadgir | alappuzha | ernakulam | idukki | kollam | kottayam | kozhikode | malappuram | palakkad | pathanamthitta | thiruvananthapuram | thrissur | wayanad | kargil | leh ladakh | lakshadweep district | ahmednagar | akola | amravati | aurangabad | beed | bhandara | buldhana | chandrapur | dhule | gadchiroli | gondia | hingoli | jalgaon | jalna | kolhapur | latur | mumbai | mumbai suburban | nagpur | nanded | nandurbar | nashik | osmanabad | palghar | parbhani | pune | raigad | ratnagiri | sangli | satara | sindhudurg | solapur | thane | wardha | washim | yavatmal | bishnupur | chandel | churachandpur | imphal east | imphal west | jiribam | kakching | kamjong | kangpokpi | noney | pherzawl | senapati | tamenglong | tengnoupal | thoubal | ukhrul | east garo hills | east jaintia hills | east khasi hills | north garo hills | ri bhoi | south garo hills | south west garo hills | south west khasi hills | west garo hills | west jaintia hills | west khasi hills | aizawl | gurdaspur | champhai | hnahthial | khawzawl | kolasib | lawngtlai | lunglei | mamit | saiha | saitual | serchhip | dimapur | kiphire | kohima | longleng | mokokchung | mon | noklak | peren | phek | tuensang | wokha | zunheboto | anugul | balangir | baleshwar | bargarh | bhadrak | boudh | cuttack | deogarh | dhenkanal | gajapati | ganjam | jagatsinghapur | jajapur | jharsuguda | kalahandi | kandhamal | kendrapara | kendujhar | khordha | koraput | malkangiri | mayurbhanj | nabarangpur | nayagarh | nuapada | puri | rayagada | sambalpur | sonepur | sundargarh | karaikal | mahe | pondicherry | yanam | amritsar | barnala | bathinda | faridkot | fatehgarh sahib | fazilka | firozepur | hoshiarpur | jalandhar | kapurthala | ludhiana | mansa | moga | pathankot | patiala | rupnagar | sangrur | s.a.s nagar | shahid bhagat singh nagar | sri muktsar sahib | tarn taran | ajmer | alwar | banswara | baran | barmer | bharatpur | bhilwara | bikaner | bundi | chittorgarh | churu | dausa | dholpur | dungarpur | ganganagar | hanumangarh | jaipur | jaisalmer | jalore | jhalawar | jhunjhunu | jodhpur | karauli | kota | nagaur | pali | pratapgarh | rajsamand | sawai madhopur | sikar | sirohi | tonk | udaipur | east district | north district | south district | west district | adilabad | bhadradri kothagudem | hyderabad | jagitial | jangoan | jayashankar bhupalapally | jogulamba gadwal | kamareddy | karimnagar | khammam | kumuram bheem asifabad | mahabubabad | mahabubnagar | mancherial | medak | medchal malkajgiri | baghpat | mulugu | nagarkurnool | nalgonda | narayanpet | nirmal | nizamabad | peddapalli | rajanna sircilla | ranga reddy | sangareddy | siddipet | suryapet | vikarabad | wanaparthy | warangal rural | warangal urban | yadadri bhuvanagiri | dadra and nagar haveli | daman | diu | dhalai | gomati | khowai | north tripura | sepahijala | south tripura | unakoti | west tripura | almora | bageshwar | chamoli | champawat | dehradun | haridwar | nainital | pauri garhwal | pithoragarh | rudra prayag | tehri garhwal | udam singh nagar | uttar kashi | agra | aligarh | ambedkar nagar | amethi | amroha | auraiya | ayodhya | bahraich | ballia | balrampur | banda | barabanki | bareilly | basti | bhadohi | bijnor | budaun | bulandshahr | chandauli | chitrakoot | deoria | etah | etawah | farrukhabad | fatehpur | firozabad | gautam buddha nagar | ghaziabad | ghazipur | gonda | gorakhpur | hamirpur | hapur | hardoi | hathras | jalaun | jaunpur | jhansi | kannauj | kanpur dehat | kanpur nagar | kasganj | kaushambi | kheri | kushi nagar | lalitpur | lucknow | maharajganj | mahoba | mainpuri | mathura | mau | meerut | mirzapur | moradabad | muzaffarnagar | pilibhit | pratapgarh | prayagraj | rae bareli | rampur | saharanpur | sambhal | sant kabeer nagar | shahjahanpur | shamli | shravasti | siddharth nagar | sitapur | sonbhadra | sultanpur | unnao | varanasi ...
     
    list of our services following states
     
    andaman and nicobar islands | andhra pradesh | arunachal pradesh | assam | bihar | chandigarh | chhattisgarh | delhi | goa | gujarat | haryana | himachal pradesh | jenglish-bazar and kashmir | jharkhand | karnataka | kerala | ladakh | lakshadweep | madhya pradesh | maharashtra | manipur | meghalaya | mizoram | nagaland | odisha | puducherry | punjab | rajasthan | sikkim | tamil nadu | telangana | the dadra and nagar haveli and daman and diu | tripura | uttarakhand | uttar pradesh | west bengal ...
     
    list of our services following districts
     
    alipurduar - i | alipurduar - ii | amdanga | amta - i | amta - ii | arambag | arsha | ausgram - i | ausgram - ii | baduria | bagda | bagmundi | bagnan - i | bagnan - ii | balagarh | balarampur | bally jagachha | balurghat | bamangola | bankura - i | bankura - ii | bansihari | barabani | barabazar | barasat - i | barasat - ii | barjora | barrackpur - i | barrackpur - ii | baruipur | basanti | basirhat - i | basirhat - ii | beldanga - i | beldanga - ii | berhampore | bhagawangola - i | bhagawangola - ii | bhagawanpur - i | bhagawanpur - ii | bhangar - i | bhangar - ii | bharatpur - i | bharatpur - ii | bhatar | binpur - i | binpur - ii | bishnupur - i | bishnupur - ii | bolpur sriniketan | bongaon | budge budge - i | budge budge - ii | bundwan | burdwan - i | burdwan - ii | burwan | canning - i | canning - ii | chakdah | chanchal - i | chanchal - ii | chandipur | chanditala - i | chanditala - ii | chandrakona - i | chandrakona - ii | chapra | chhatna | chinsurah - magra | chopra | contai - i | contai - iii | cooch behar - i | cooch behar - ii | dantan - i | dantan - ii | darjeeling pulbazar | daspur - i | daspur - ii | debra | deganga | deshopran | dhaniakhali | dhupguri | diamond harbour - i | diamond harbour - ii | dinhata - i | dinhata - ii | domjur | domkal | dubrajpur | egra - i | egra - ii | english bazar | falakata | falta | farakka | faridpur durgapur | gaighata | galsi - i | galsi - ii | gangajalghati | gangarampur | garbeta - i | garbeta - ii | garbeta - iii | gazole | ghatal | goalpokhar - i | goalpokhar - ii | goghat - i | goghat - ii | gopiballavpur - i | gopiballavpur - ii | gorubathan | gosaba | habibpur | habra - i | habra - ii | haldia | haldibari | hanskhali | hariharpara | haringhata | haripal | harirampur | harischandrapur - i | harischandrapur - ii | haroa | hasnabad | hemtabad | hilli | hingalganj | hirbandh | hura | illambazar | indpur | indus | islampur | itahar | jagatballavpur | jaipur | jalangi | jalpaiguri | jamalpur | jamboni | jamuria | jangipara | jaynagar - i | jaynagar - ii | jaypur | jhalda - i | jhalda - ii | jhargram | jorebunglow sukiapokhri | kakdwip | kalchini | kaliachak - i | kaliachak - ii | kaliachak - iii | kaliaganj | kaliganj | kalimpong -i | kalimpong - ii | kalna - i | kalna - ii | kalyani | kandi | kanksa | karandighi | karimpur - i | karimpur - ii | kashipur | katwa - i | katwa - ii | keshiary | keshpur | ketugram - i | ketugram - ii | khanakul - i | khanakul - ii | khandaghosh | kharagpur - i | kharagpur - ii | khargram | kharibari | khatra | khejuri - i | khejuri - ii | khoyrasol | kolaghat | kotulpur | krishnaganj | krishnagar - i | krishnagar - ii | kulpi | kultali | kumarganj | kumargram | kurseong | kushmundi | labpur | lalgola | lava | madarihat | magrahat - i | magrahat - ii | mahisadal | mal | maldah (old) | manbazar - i | manbazar - ii | mandirbazar | mangolkote | manikchak | manteswar | mathabhanga - i | mathabhanga - ii | mathurapur - i | mathurapur - ii | matiali | matigara | maynaguri | mayureswar - i | mayureswar - ii | mejhia | mekliganj | memari - i | memari - ii | midnapore | minakhan | mirik | mohammad bazar | mohanpur | moyna | murarai - i | murarai - ii | murshidabad jiaganj | nabadwip | nabagram | nagrakata | nakashipara | nalhati - i | nalhati - ii | namkhana | nanda kumar | nandigram - i | nandigram - ii | nanoor | narayangarh | nawda | naxalbari | nayagram | neturia | onda | ondal | panchla | pandabeswar | pandua | panskura | para | patharpratima | patrasayer | pedong | phansidewa | pingla | polba - dadpur | potashpur - i | potashpur - ii | puncha | purbasthali - i | purbasthali - ii | pursura | purulia - i | purulia - ii | raghunathganj - i | raghunathganj - ii | raghunathpur - i | raghunathpur - ii | raiganj | raina - i | raina - ii | raipur | rajarhat | rajganj | rajnagar | ramnagar - i | ramnagar - ii | rampurhat - i | rampurhat - ii | ranaghat - i | ranaghat - ii | rangli rangliot | ranibundh | raniganj | raninagar - i | raninagar - ii | ratua - i | ratua - ii | sabang | sagar | sagardighi | sahid matangini | sainthia | salanpur | salbani | saltora | samserganj | sandeshkhali - i | sandeshkhali - ii | sankrail | sankrail | santipur | santuri | sarenga | serampur uttarpara | shyampur - i | shyampur - ii | simlapal | singur | sitai | sitalkuchi | sonamukhi | sonar pur | suri - i | suri - ii | sutahata | suti - i | suti - ii | swarupnagar | taldangra | tamluk | tapan | tarakeswar | tehatta - i | tehatta - ii | thakurpukur mahestola | tufanganj - i | tufanganj - ii | udaynarayanpur | uluberia - i | uluberia - ii | vishnupur ...
     
    list of our services following districts
     
    car nicobar | diglipur | ferrargunj | great nicobar | little andaman | mayabunder | nancowry | port blair | rangat | aalo hq | anelih | anini | bagra circle | balemu circle | balijan adc | bameng adc | bana eac | banderdewa circle | baririjo circle | basar adc | bhalukpong eac | bilat circle | boleng adc | bomdila hq | bongkhar circle | bordumsa adc | borduria circle | borum | buragaon eac | chaglagam circle | chambang circle | changlang hq | chayangtajo adc | chetam peer yapu circle | chongkham eac | dadam circle | dambuen circle | dambuk adc | damin circle | daporijo hq | darak circle | daring circle | debeyar co circle | deed circle | deomali adc | desali circle | dirang adc | dissing passo circle | diyun eac | doimukh sdo | dollungmukh circle | dudunghar circle | dumporijo adc | etalin | gangte circle | geku eac | gelling circle | gensi eac | gepen circle | giba circle | gite ripa circle | goiliang circle | gumto circle | gyawe purang circle | hawai hq | hayuliang adc | hunli sdo | itanagar eac | jairampur adc | jamiri circle | jang adc | jengging circle | jomlo mobuk circle | kakoi circle | kalaktang adc | kamba adc | kamengbari doimara circle | kamporijo circle | kangku circle | kantang circle | kanubari adc | katan circle | katang circle | kaying eac | kebang circle | kharsang circle | khenawa circle | khimiyang eac | khonsa hq | kibithoo circle | kimin sdo | kitpi circle | koloriang hq | kombo circle | kora circle | koronu circle | koyu eac | kronli (arzoo circle) | lada circle | laju sdo | lathao circle | lawnu circle | lekang mahadevpur circle | leporiang circle | lhou circle | likabali sdo | limeking circle | liromoba eac | longding hq | longo circle | lumla adc | lyngok longtoi circle | manchal circle | manmao eac | mariyang adc | maro circle | mebo adc | mechuka adc | mengio eac | metengliang circle | miao adc | migging circle | mipi | monigong eac | mopom adipasi circle | mukto circle | nacho sdo | nafra eac | naharlagun eac | nampong sdo | namsai hq | namsing circle | namtok eac | nari adc | new seren circle | nikte kodum circle | nilling circle | nyapin adc | nyobia circle | old ziro sdo | oyan circle | pakke kessang eac | pakoti circle | palin circle | palling circle | pangchao sdo | pangin eac | parang circle | parbuk sdo | pasighat hq | passa valley circle | patuk adc | payeng circle | payum circle | phassang circle | pidi circle | pipsorang circle | pipu dipu circle | pistana circle | piyong circle | pizirang veo circle | polosang circle | puchi geko circle | pumao circle | raga adc | rebo perging circle | renuk circle | richukrong circle | riga eac | roing hq | ruksin adc | rumgong adc | rupa sdo | sagalee adc | sago | sangdupota basar nello circle | sangram sdo | sarli circle | sawa circle | segi gusar circle | seijosa adc | seppa hq | shergaon circle | sibe circle | silsango circle | singa circle | singchung adc | siyum adc | soha circle | sunpura circle | taksing circle | tali adc | taliha adc | tarak lengdi cicle | taraso circle | tato eac | tawang hq | tezu hq | thembang circle | thingbu circle | thrizino adc | tikhak rima putok circle | tinali paglam circle | tirbin eac | toru circle | tuting adc | vijoynagar eac | wakka sdo | wakro circle | walong circle | yachuli adc | yangte circle | yatdam circle | yazali circle | yingkiong circle | yomcha adc | zemithang circle | ziro hq | agamoni | algapur | amguri | athani | azara | badarpur | baganpara (pt) | baghbor | bagribari (pt) | bajali (pt) | balijana | banekuchi | barama pt | barbhag | barkhetri | barnagar (pt) | barpeta | baska | bengtol | bhowraguri | bhuragaon | bihpuria | bijni (pt) | bilasipara pt | biswanath | boitamari | bokakhat | boko | bongaigaon (pt) | chabua | chamaria | chandrapur | chapar pt | chariduar | chenga | chhaygaon | dalgaon (pt) | dangtal revenue circle | dergaon | dhakuakhana (pt-i) | dhekiajuli (pt) | dhemaji | dhing | dhubri | dibrugarh east | dibrugarh west | dimow | diphu | dispur | doboka | donka | doom dooma | dotoma | dudhnai | gauripur | ghograpar (pt) | gogamukh | gohpur | golaghat | golakganj pt | goreswar (pt) | goroimari | gossaigaon (pt) | guwahati | haflong | hailakandi | hajo | harisinga | helem | hojai | jalah (pt) | jonai | jorhat east | jorhat west | kadam | kalaigaon | kalgachia | kaliabor | kamalpur | kampur | karimganj | katigora | katlichara | khoirabari | khumtai | kokrajhar | koya | laharighat | lakhipur | lakhipur | lala | lanka | mahmora | majuli | mangaldoi (pt) | mankachar | margherita | mariani | marigaon | matia | mayong | mazbat | mikirbheta | moran | morangi | na-duar | nagaon | nagarbera | naharkatiya | nalbari | naobaicha | narayanpur | nazira | nilambazar | north guwahati (pt) | north lakhimpur | pachim nalbari | palasbari | patharkandi | pathorighat (pt) | phuloni | raha | ramkrishna nagar | rangia pt | rangjuli | rupahi | sadiya | samaguri | sapekhati | sarthebari | sarupathar | sarupeta (pt) | sibsagar | sidli (pt) | silchar | silonijan | sipajhar | sissibargaon | sonai | sonapur | sonari | sonari | south salmara | srijangram | subansiri (pt-i) | tamulpur | tengakhat | teok | tezpur | thelamara | tihu (pt) | tingkhong | tinsukia | titabor | udalguri | udarbond | ujani majuli circle | bishnupur | borobekra | bungte chiru | chakpikarong | champhai | chandel | chilivai phaibung | chingai | churachandpur | haochong | henglep | island | jessami | jiribam | kakching | kamjong | kangchup geljang | kangpokpi | kangvai | kasom khullen | keirao bitra | khengjoy | khoupum | lamphelpat | lamsang | lhungtin | lilong | lm | longmai | machi | moirang | moreh | mualnuam | nambol | nungba | paomata | patsoi | phungyar | porompat | purul | sahamphung | saikot | saikul | saitu-gamphazol | samulamlan | sangaikot | sawombung | singngat | song song | suangdoh | tadubi | tamenglong | tamenglong north | tamenglong west | tengnoupal | thanlon | thoubal | tipaimukh | tuibong | t vaichong | ukhrul | vangai range | waikhong | wangoi | willong | amlarem | baghmara | bajengdoba | betasing | bhoirymbong | chokpot | dadenggiri | dalu | damalgre | dambo rongjeng | demdema | gambegre | gasuapara | jirang | kharkutta | khatarshnong laitkroh | khliehriat | laskein | mairang | mawkynrew | mawkyrwat | mawlai | mawpat | mawphlang | mawryngkneng | mawshynrut | mawsynram | mawthadraishan | mylliem | nongstoin | pynursla | ranikor | resubelpara | rongara | rongram | saipung | samanda | selsella | shella bholaganj | sohiong | songsak | thadlaskein | tikrikilla | umling | umsning | zikzak | aibawk | bilkhawthlir | champhai | chawngte | darlawn | east lungdar | hnahthial | khawbung | khawzawl | lawngtlai | lunglei | lungsen | ngopa | 'n' thingdawl | phullen | reiek | saiha | sangau | s' bungtlang | serchhip | thingsulthliah | tlangnuam | tuipang | west bunghmun | west phaileng | zawlnuam | aboi | aghunato | aitepyong | akuhaito | akuluto | alongkima | amahator | angjangyang | aquqhnaqua | asuto | athibung | atoizu | baghty | bhandari | botsa | changpang | changtongya | chare | chen | chessore | chetheba | chiephobozou | chingmei | chizami | chozuba | chuchuyimlang | chukitong | chumukedima | chunlikha | dhansiripar | dimapur sadar | englan | ghathashi | hunta | jakhama | jalukie | kebai khelma | kezocha | khezhakeno | khongsa | khuza | kikruma | kiphire sadar | kiusam | kohima sadar | kubolong | kuhoboto | longchem | longkhim | longleng | longmatra | longshen | lotsu | mangko | mangkolemba | medziphema | meluri | merangmen | mon sadar | monyakshu | mopong | naginimora | namsang | ngoungchung | nihokhu | niuland | nokhu | noklak | noksen | nsong | ongpangkong | ongpangkong (n) | panso | pedi (ngwalwa) | peren | pfutsero | phek sadar | phokhungri | phomching | phor | pughoboto | pungro | ralan | razieba | sakraba | sakshi | sangsangnyu | sanis | saptiqa | satakha | satoi | sechu-zubza | sekruzu | seyochung | shamator | shangnyu | sitimi | sotokur | sungro | suruhuto | tamlu | tening | thonoknyu | tizit | tobu | tokiye | tseminyu | tsogin | tsurangkong | tsurungto | tuensang sadar | tuli | v.k. | wakching | weziho | wokha sadar | wozhuro | yongnyah | zuketsa | zunheboto sadar | chungthang | dentam | dzongu | gangtok | gyalshing | jorethang | kabi | mangan | namchi | pakyong | rangpo | ravong | rongli | soreng | yangang | yuksom | amarpur | ambassa | belonia | bishalgarh | dharmanagar | gandacherra | jampuijala | jirania | kailashahar | kamalpur | kanchanpur | karbook | khowai | kumarghat | longtharai valley | mohanpur | panisagar | sabroom | sadar | santirbazar | sonamura | teliamura | udaipur ...