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PHASED ARRAY ULTRASONIC TESTING (PAUT)
 
 
 

Phased array ultrasonic (PA) is an advanced method of ultrasonic testing that has applications in medical imaging and industrial nondestructive testing. Common applications are to non invasively examine the heart or to find flaws in manufactured materials such as welds. Single-element (non-phased array) probes, known technically as monolithic probes, emit a beam in a fixed direction. To test or interrogate a large volume of material, a conventional probe must be physically scanned (moved or turned) to sweep the beam through the area of interest. In contrast, the beam from a phased array probe can be moved electronically, without moving the probe, and can be swept through a wide volume of material at high speed. The beam is controllable because a phased array probe is made up of multiple small elements, each of which can be pulsed individually at a computer-calculated timing. The term phased refers to the timing, and the term array refers to the multiple elements. Phased array ultrasonic testing is based on principles of wave physics, which also have applications in fields such as optics and electromagnetic antennae.



Principle of operation

The PA probe consists of many small ultrasonic transducers, each of which can be pulsed independently. By varying the timing, for instance by pulsing the elements one by one in sequence along a row, a pattern of constructive interference is set up that result in a beam at a set angle. In other words, the beam can be steered electronically. The beam is swept like a search-light through the tissue or object being examined, and the data from multiple beams are put together to make a visual image showing a slice through the object.



Phased array used in the industry

Phased array is widely used in several industrial sectors, such as construction or power generation. This method is an advanced NDT method that is used to detect component failures i.e. cracks or flaws and thereby determine component quality. Due to the possibility to control parameters such as beam angle and focal distance, this method is very efficient regarding the defect detection and speed of testing.[1] Apart from detecting flaws in components, phased array can also be used for wall thickness measurements in conjunction with corrosion testing Phased array can be used for the following industrial purposes :

  • Inspection of Welds
  • Thickness measurements
  • Corrosion inspection
  • Flaw detection


Features of phased array

At a construction site, a technician tests a pipeline weld for defects using an ultrasonic phased array instrument. The scanner, which consists of a frame with magnetic wheels, holds the probe in contact with the pipe by a spring. The wet area is the ultrasonic couplant that allows the sound to pass into the pipe wall.

  • The method most commonly used for medical ultrasonography.
  • Multiple probe elements produce a steerable, tightly focused, high-resolution beam.
  • Produces an image that shows a slice through the object.
  • Compared to conventional, single-element ultrasonic testing systems, PA instruments and probes are more complex and expensive.
  • In industry, PA technicians require more experience and training than conventional UT technicians.


Standards
European Committee for Standardization (CEN)
  • EN 16018, Non destructive testing - Terminology - Terms used in ultrasonic testing with phased arrays
  • ISO/WD 13588 - EN 13588, Non-destructive testing of welds – Ultrasonic testing – Use of (semi-) automated phased array technology
 
NDT TESTING SERVICES (NON DESTRUCTIVE TESTING SERVICES)
 
  • Non Destructive Testing
  • Ndt Services
  • Ultrasonic Testing
  • Magnetic Particle Testing
  • Dye Penetrant Testing
  • Radiographic Testing
  • Eddy Current Testing
  • Vibration Analysis
  • PAUT - TOFD
  • Ultrasonic Thickness Gauging Testing
  • Helium leak detection Services
  • RFET / NFET / PECT Testing
  • Internal Rotary Inspection system (IRIS)
  • Acoustic Pulse Reflectometry (APR)
  • Positive Material Identification Testing
  • Magnetic flux leakage (MFL)
  • Acoustic emission Testing
  • Flouresent Leak Detection
  • Long range ultrasonic testing - LRUT
  • Thermography Inspection Services
  • Leak Testing
  • TKY Joints Ultrasonic Testing
  • AWS D1.1 Structural steel ultrasonic Testing
  •  
    NDT CAPABILITIES FOR MECHANICAL AND CIVIL
    • Ultrasonic Inspection
    • Time of Flight Diffraction (TOFD) and Phased Array UT
    • Magnetic Particle Testing
    • Dye Penetrant Testing
    • Radiographic Testing
    • Eddy Current Testing
    • Weld ability Study
    • Visual Inspection and Field Services

     
    CIVIL NDT TESTING - NON-DESTRUCTIVE TESTING SERVICES
     
    CONCRETE FOR BRIDGES, DAMS, BUILDINGS, SUBWAYS, TUNNELS ETC..
    • Ultrasonic Pulse Velocity Testing
    • Rebound Hammer Testing
    • Rebar Locator
    • Depth of concrete
    • Half Cell Potential Testing
    • Carbonation Testing
    • Pile Integrity Testing
    • Visual Inspection and Field Services
    CIVIL NDT - CONCRETE TESTING SERVICES
    CONCRETE FOR BRIDGES, DAMS, BUILDINGS, SUBWAYS, TUNNELS ETC..
    • 1. Ultrasonic Pulse Velocity Testing
    • 2. Rebound Hammer Testing
    • 3. Rebar Locator
    • 4. Depth of concrete
    • 5. Half Cell Potential Testing
    • 6. Carbonation Testing
    • 7. Pile Integrity Testing
    • 8. Visual Inspection and Field Services
    • 9. In-Situ Compressive Strength (design strength, and existing structures)
    •  
      CONSTRUCTION MATERIALS TESTING EQUIPMENTS:
       
    • 1. Pile Testing Systems
    • 2. Structural Monitoring Systems
    • 3. Asphalt Testing Systems
    • 4. Pavement Testing
    • 5. Rock and Soil Laboratory Test Systems
    • 6. Non-Destructive Tests for Concrete
    • 7. Geotechnical & Vibration Monitoring Systems
    • 8. Pavement Condition Monitoring
    • 9. Concrete and Cement Lab Systems
    •  
      LAB TESTING - CONCRETE AND CONCRETING MATERIALS
       
    • Laboratory Tests on Construction Materials as per Standards.
    •  
    • 1. Cement
    • 2. Aggregate
    • 3. Bricks
    • 4. Blocks
    • 5. Tension test on rebars
    • 6. Chemical test on Rebars
    • 7. Water Analysis
    • 8. Cube test
    • 9. Accelerated cube test (ACT)
    • 10. Rapid Chloride test (RCPT)
    • 11. Concrete Mix Design
    • 12. Fly ash
    • 13. Slag and Silica fume
    • 14. Self compacting concrete
    • 15. Temperature controlled concrete
    •  
      CIVIL NDT AND CONCRETE - TESTING SERVICES
       
    • 1. Civil NDT Investigation
    • 2. Concrete Investigation
    • 3. coating Thickness Measurement on Concrete Structures
    • 4. Compressive Strength Testing
    • 5. Concrete Mix Design
    • 6. Bitumen Mix Design
    • 7. Core extraction Testing
    • 8. Core Sampling Testing
    • 9. Concrete Core Testing
    • 10. Concrete Cube Testing
    • 11. Chemical Analysis
    • 12. Electrical Resistivity Testing
    • 13. Ground Penetrating Radar Survey
    • 14. Sieve Analysis
    • 15. Ultrasonic Low Frequency Testing
    • 16. UPV Testing
    • 17. Vibration Analysis of Building
    • 18. Leak Testing
    • 19. CT Scan on Conctete
    • 20. Element Analysis on Concrete
    • 21. Impact Echo Testing
    • 22. Linear Polarization Testing
    • 23. Load Testing
    • 24. Permeability Testing
    • 25. petrography of concrete
    • 26. Pullout Testing
    • 27. Cut and Pullout Testing (CPO Test)
    • 28. Impulse Response Test
    • 29. Impact Echo Test
    • 30. Ground Penetrating Radar (GPR)
    • 31. Crack Depth Measurement
    •  
      Reinforcement Location and Corrosion Assessments
       
    • 1. Reinforcement Location by Ground Penetrating Radar (GPR)
    • 2. Cover Assessment
    • 3. Half Cell Potential Tests
    • 4. Resistivity Tests
    • 5. Corrosion Rate Assessment
    • 6. Carbonation Test
    •  
      Repair Quality Assessment
       
    • 1. Bond Test
    • 2. Anchor / Rebar Pull-out Strength
    • 3. Chemical Tests
    •  
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      andaman and nicobar islands | andhra pradesh | arunachal pradesh | assam | bihar | chandigarh | chhattisgarh | delhi | goa | gujarat | haryana | himachal pradesh | jmanipur 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 ...
       
      list of our services following countries
       
      India | China | United States | Indonesia | Pakistan | Brazil | Nigeria | Bangladesh | Russia | Mexico | Japan | Ethiopia | Philippines | Egypt | Vietnam | DR Congo | Turkey | Iran | Germany | Thailand | United Kingdom | France | Italy | Tanzania | South Africa | Myanmar | Kenya | South Korea | Colombia | Spain | Uganda | Argentina | Algeria | Sudan | Ukraine | Iraq | Afghanistan | Poland | Canada | Morocco | Saudi Arabia | Uzbekistan | Peru | Angola | Malaysia | Mozambique | Ghana | Yemen | Nepal | Venezuela | Madagascar | Cameroon | Côte d'Ivoire | North Korea | Australia | Niger | Sri Lanka | Burkina Faso | Mali | Romania | Malawi | Chile | Kazakhstan | Zambia | Guatemala | Ecuador | Syria | Netherlands | Senegal | Cambodia | Chad | Somalia | Zimbabwe | Guinea | Rwanda | Benin | Burundi | Tunisia | Bolivia | Belgium | Haiti | Cuba | South Sudan | Dominican Republic | Czech Republic | Greece | Jordan | Portugal | Azerbaijan | Sweden | Honduras | United Arab Emirates | Hungary | Tajikistan | Belarus | Austria | Papua New Guinea | Serbia | Israel | Switzerland | Togo | Sierra Leone | Laos | Paraguay | Bulgaria | Libya | Lebanon | Nicaragua | Kyrgyzstan | El Salvador | Turkmenistan | Singapore | Denmark | Finland | Congo | Slovakia | Norway | Oman | State of Palestine | Costa Rica | Liberia | Ireland | Central African Republic | New Zealand | Mauritania | Panama | Kuwait | Croatia | Moldova | Georgia | Eritrea | Uruguay | Bosnia and Herzegovina | Mongolia | Armenia | Jamaica | Qatar | Albania | Lithuania | Namibia | Gambia | Botswana | Gabon | Lesotho | North Macedonia | Slovenia | Guinea-Bissau | Latvia | Bahrain | Equatorial Guinea | Trinidad and Tobago | Estonia | Timor-Leste | Mauritius | Cyprus | Eswatini | Djibouti | Fiji | Comoros | Guyana | Bhutan | Solomon Islands | Montenegro | Luxembourg | Suriname | Cabo Verde | Micronesia | Maldives | Malta | Brunei | Belize | Bahamas | Iceland | Vanuatu | Barbados | Sao Tome & Principe | Samoa | Saint Lucia | Kiribati | Grenada | St. Vincent & Grenadines | Tonga | Seychelles | Antigua and Barbuda | Andorra | Dominica | Marshall Islands | Saint Kitts & Nevis | Monaco | Liechtenstein | San Marino | Palau | Tuvalu | Nauru | Holy See ...