Carbon steel pipe fittings are the most widely used pipe fittings. The main products include
carbon steel elbows, carbon steel flanges, carbon steel tees, carbon steel crosses, carbon steel reducers (large and small heads), and carbon steel pipe caps etc. The main implementation standards for carbon steel pipe fittings include national standards, American standards, Japanese standards, etc. The Chinese standards also include standards of the Ministry of Chemical Industry, Sinopec pipe fittings standards, and power pipe fittings standards.
International Standards:
International carbon steel pipe fittings standards mainly include: ASME, DIN, EN, JIS and ISO, etc. Among them, the ASME series is mainly suitable for the American market, the DIN series is mainly suitable for the German market, the EN series is mainly suitable for the European market, the JIS series is mainly suitable for the Japanese market, and the ISO series is an international standard.
ASME B16.5 and ASME B16.9 are commonly used pipe fitting standards in the ASME series of standards and are suitable for the US market. Details are as follows:
ASME/ANSI B16.5 Pipe Flanges and Flange Accessories
ASME/ANSI B16.9 Factory Made Forged Steel Butt Weld Fittings
ASME/ANSI B16.11 Socket Weld and Threaded Forged Fittings
ASME/ANSI B16.28 Steel Butt Weld Small Radius Elbows and Return Bends
MSS SP-43 Forged Stainless Steel Butt Welding Pipe Fittings
MSS SP-83 Socket Weld and Threaded Unions
MSS SP-97 Integral Reinforced Pipe Seats for Socket Weld, Threaded and Butt Weld Ends
DIN 2605 and DIN 2615 are commonly used pipe fitting standards in the DIN series of standards and are suitable for the German market.
EN 10253, EN 10254 and EN 10255 are commonly used pipe fitting standards in the EN series of standards, applicable to the European market.
JIS B2311, JIS B2312 and JIS B2313 are commonly used pipe fitting standards in the JIS series of standards and are applicable to the Japanese market.
ISO 15590-1 is a commonly used international standard for pipe fittings.
Chinese Standard:
The main domestic carbon steel pipe fittings implementation standards include: GB, JB, HG, etc. Among them, the GB series belongs to the national standard and is applicable to various fields nationwide. JB series belongs to the machinery industry standard and is suitable for the field of machinery manufacturing. The HG series is a chemical industry standard and is suitable for use in chemical manufacturing.
Commonly used standards in the GB series include GB/T 1239.1, GB/T 12459, GB/T 17185 and GB/T 9112.
Among them, GB/T 1239.1 is part of the standard for carbon steel sockets for pipes and is mainly applicable to general-purpose piping systems.
GB/T 12459 is part of the standard for steel pipe flanges and steel pipe fittings and is suitable for connecting flanges and pipe fittings of various standards and materials in pipeline systems.
GB/T 17185 is part of the standard for elbows, tees, reducers and size end joints, and is applicable to various forms and sizes of pipe joints involved in piping systems.
GB/T 9112 is part of the universal flange standard and is suitable for connecting flanges of various standards and materials in piping systems.
Commonly used JB series standards include JB/T 81, JB/T 82 and JB/T 3573.
Among them, JB/T 81 is a carbon steel socket standard for pipes that belongs to the machinery industry standard.
JB/T 82 is part of the standard for steel pipe flanges and steel pipe fittings, and is suitable for connecting flanges and pipe joints of various standards and materials.
JB/T 3573 is a standard for elbows, tees and crosses in the machinery industry, and is suitable for connecting various forms and sizes of pipe joints in pipeline systems.
Commonly used standards in the HG series include HG/T 20592, HG/T 20615 and HG/T 20623.
Among them, HG/T 20592 is a general steel pipe fitting standard that belongs to the chemical industry standard, including elbows, tees, crosses and other pipe fittings.
HG/T 20615 is a chemical industry standard for steel pipe flanges and steel pipe fittings.
HG/T 20623 is a commonly used flange standard that belongs to the chemical industry standard.
Standard updates and trends:
With the development and technological advancement in various fields, carbon steel pipe fitting standards are constantly being updated and changing trends. Among them, energy conservation, environmental protection and sustainable development are the main trends in current standard updates. In addition, with the application of digital technology, the formulation and management of standards are increasingly becoming digital and standardized.
Generally speaking, the implementation standards of carbon steel pipe fittings are an important guarantee for ensuring the safety and reliability of pipeline systems. Constantly updating and optimizing standards will help improve the operating efficiency and safety of pipeline systems and promote the sustainable development of the industry.
Read more: Carbon Steel Pipe Fittings VS. Stainless Steel Pipe Fittings
