GB Flanges

ASME B16.5 GB slip on Flanges Supplier, GB weld neck Flange, GB Socket Weld Flanges, GB Threaded Flanges, GB Plate Flange, GB Spectacle blind Flanges Manufacturer in India.

The GB flange system, also known as the Chinese standard flange system, is a set of specifications for manufacturing flanges in China. It is created to be consistent with both the ANSI flange system and the DIN flange system, which are widely used in the United States and Europe, respectively.The GB flange system includes a range of flange types and sizes, such as welding neck flanges, slip-on flanges, blind flanges, and threaded flanges, with dimensions specified in millimeters. GB flanges are commonly used in various industries in China, such as oil and gas, chemical, and construction industries.

GB/T 9112-9113.4-2000 specifies the dimensions and technical requirements for welding neck flanges and slip-on flanges in nominal sizes ranging from DN10 to DN2000 and DN10 to DN1800, respectively.GB/T 17241.1-17241.7 specifies the dimensions, tolerances, and technical requirements for various types of steel pipe flanges, including welding neck flanges, slip-on flanges, threaded flanges, and blind flanges, in nominal sizes ranging from DN10 to DN4000.

GB/T 15530.1-15530.8 specifies the dimensions, tolerances, and technical requirements for socket welding flanges, threaded flanges, blind flanges, and slip-on flanges in nominal sizes ranging from DN10 to DN2000 and pressure ratings from PN0.6 to PN6.4 MPA.The pressure ratings for GB flanges range from PN0.6 to PN6.4 MPA, which corresponds to pressure classes from 150 to 600 in the ANSI flange system and from PN2.5 to PN100 in the DIN flange system.

GB Flanges Supplier

Suppliers of GB Welding Neck Flange, Check Sizes And Dimensions Of ANSI B16.5 GB Forged Flanges, Ready Stock of GB Socket Weld Flange, GB Ring Type Joint Orifice Flange, GB Blind Flanges.

GB Flange Specifications

Size Range

1/2" (15 NB) to 48" (1200NB) DN10~DN5000

Class / Pressure Rating

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Standards / Dimensions

ANSI/ASME B16.5, B16.36, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605

Connection Type

Ring Joint Flange (RTJ), Flat Face Flange (FF), Raised Face Flange (RF), Male and Female Flange (M & F), Lap Joint Flange, Large and Small Tongue-and-Groove Flange (T & G)

Find the largest ready stock of GB Flanges, Check Availability of ANSI B16.5 GB Threaded Flanges, ASME B16.5 GB RF Flanges Supplier, GB Reducing Flanges Stockist, GB Flange Price List, GB Slip On Flanges Dealer, GB Forged Flanges in Mumbai, India.

GB Standard FlangesDimensions


GB9119,2—88
GB9119,2—88
inNPS10kg=1.0MPaNPS16kg=1.6MPa
ODDia of boltsHolesThicknessODdistance of boltsDia of boltsHolesThickness
3/8DN10506014414DN10906014414
1/2DN15596514414DN15956514414
3/4DN201057514416DN201057514416
1DN251158514416DN251158514416
11/4DN3214010018418DN3214010018418
11/2DN4015011018418DN4015011018418
2DN5016512518420DN5016512518420
21/2DN6518514518420DN6518514518420
3DN8020016018820DN8020016018820
31/2DN10022018018822DN10022018018822
4DN12525021018822DN12525021018822
5DN15028524022824DN15028524022824
6DN20034029522824DN20034029522826
8DN250395350221226DN250405355261229
10DN300445400221228DN300460410261232
12DN350505460221630DN350520470261635
14DN400565515261632DN400580525301638
16DN450615565262035DN450640585302042
18DN500670620262038DN500715650332046
20DN600780725262042DN600840770362052

Best quality GB Flanges, ASME B16.5 GB Weldoflange, GB Nipoflange, GB Square Flange, GB  Flanges Price, GB RTJ Flange, GB langes Raised Face, ASME B16.5 GB Groove Flange, View Specification Of GB Orifice Flange, GB Flanges Facing Type & Finish,GB Expander Flanges at Best Price.

GB Flanges Applications

Australia, Afghanistan, Algeria, Angola, Argentina, Armenia, Azerbaijan, Bahrain, Bangladesh, Benin,
Bhutan, Botswana, Brazil, Brunei, Burkina Faso, Cambodia, Cameroon, Canada, Central Africa Republic,
Chad, Chile, Colombia, Cuba, Cyprus, DRC, Djibouti, Egypt, Equatorial Guinea, Eritrea, Eswatini,
Ethiopia, Fiji, Finland, France, Georgia, Germany, Ghana, Greece, Hungary, Iceland, Indonesia, Iran,
Iraq, Ireland, Israel, Italy, Japan, Jordan, Kazakhstan, Kenya, Kuwait, Kyrgyzstan, Laos, Lebanon,
Lesotho, Liberia, Libya, Lithuania, Madagascar, Malawi, Malaysia, Maldives, Mali, Mexico, Morocco,
Mozambique, Mauritania, Myanmar, Namibia, Nepal, Netherlands, New Zealand, Nigeria, Norway, Oman,
Panama, Peru, Philippines, Poland, Portugal, Palestine, Qatar, Russia, Rwanda, Romania, Saudi Arabia,
Senegal, Sierra Leone, Singapore, Slovakia, Somalia, South Africa, South Korea, South Sudan, Spain,
Sri Lanka, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Tasmania, Thailand, The Gambia,
Timor-Leste, Togo, Tunisia, Turkey, Turkiye, Turkmenistan, Uganda, Uzbekistan, United Arab Emirates (UAE),
United Kingdom (UK), United States (US), Venezuela, Vietnam, Yemen, Zambia, Zimbabwe

Abu Dhabi, Amsterdam, Abuja, Accra, Addis Ababa, Ahmedabad, Algiers, Amman, Ankara, Antananarivo,
Ashgabat, Asmara, Astana, Athens, Baghdad, Baku, Bamako, Bandar Seri Begawan, Bangkok, Bangui,
Banjul, Beirut, Bengaluru, Berlin, Bishkek, Bloemfontein, Bogotá, Bern, Brasília, Bratislava,
Bucharest, Budapest, Buenos Aires, Cairo, Canberra, Cape Town, Caracas, Chennai, Coimbatore, Dakar,
Damascus, Dhaka, Dili, Djibouti city, Dodoma, Doha, Dublin, Dushanbe, Freetown, Gaborone, Ghaziabad,
Guwahati, Hanoi, Harare, Havana, Helsinki, Hobart, Hyderabad, Indore, Jaipur, Jakarta, Jerusalem,
Juba, Jurong East, Kabul, Kampala, Kanpur, Kathmandu, Kigali, Kinshasa, Kochi, Kolkata, Kuala Lumpur,
Kuwait City, Lisbon, Lilongwe, Lima, Lobamba, Lomé, London, Luanda, Lucknow, Lusaka, Malabo, Madrid,
Malé, Mexico City, Manama, Moscow, Manila, Maputo, Maseru, Mbabane, Mogadishu, Monrovia, Mumabi,
Muscat, Nagpur, Nairobi, New Delhi, Niamey, Nicosia, Noida, Nouakchott, N’Djamena, Oslo, Ottawa,
Ouagadougou, Panama City, Paris, Patna, Phnom Penh, Porto-Novo, Pretoria, Pune, Rabat, Reykjavík,
Riyadh, Rome, Sana’a, Santiago, Sri Jayawardenepura Kotte, Stockholm, Seoul, Singapore, Surat,
Suva, Taipei City, Tashkent, Tokyo, Tbilisi, Tehran, Thimphu, Tripoli, Tunis, Vientiane, Vilnius,
Visakhapatnam, Warsaw, Washington D.C., Wellington, Windhoek, Yaoundé, Yerevan, Naypyidaw

GB Flanges Price

Omaa Metal Sources is GB Flanges Exporters and Suppliers in the US, UK, South Africa, Saudi Arabia, Singapore, UAE, Oman, South Korea, Turkey, Bahrain, Malaysia, Philippines, Thailand, Norway, Indonesia, Iraq, Yemen, Bangladesh, Nigeria, Egypt, Peru, Ghana, Morocco, Etc.

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