Carbon steel pipe fittings standards

Carbon steel pipe fittings are the most widely used type of pipe fittings. The implementation standards for carbon steel pipe fittings are crucial for ensuring the safety and reliability of pipeline systems. Continuously updating and optimizing these standards enhances operational efficiency, safety, and promotes the sustainable development of the industry. This article provides a detailed overview of the implementation standards for carbon steel pipe fittings.

1. International Standards

The primary international standards for carbon steel pipe fittings include ASME, DIN, EN, JIS, and ISO. Each set of standards caters to different regional markets:

ASME: Predominantly used in the American market.

DIN: Common in the German market.

EN: Applied within the European market.

JIS: Used in the Japanese market.

ISO: Serves as an international standard.

- Key ASME Standards:

ASME/ANSI B16.5: Pipe Flanges and Flange Accessories

ASME/ANSI B16.9: Factory-Made Wrought Steel Butt Welding Fittings

ASME/ANSI B16.11: Forged Fittings, Socket-Welding and Threaded

ASME/ANSI B16.28: Wrought Steel Butt Welding Short Radius Elbows and Returns

MSS SP-43: Wrought Stainless Steel Butt-Welding Fittings

MSS SP-83: Class 3000 Steel Pipe Unions, Socket-Welding and Threaded

MSS SP-97: Integrally Reinforced Forged Branch Outlet Fittings, Socket Welding, Threaded, and Butt Welding Ends

- Key DIN Standards:

DIN 2605: Pipe Bends

DIN 2615: Tees for Welding

- Key EN Standards:

EN 10253: Butt-Welding Pipe Fittings

EN 10254: Flanges and their Joints

EN 10255: Non-Alloy Steel Tubes Suitable for Welding and Threading

- Key JIS Standards:

JIS B2311: Butt-Welding Pipe Fittings

JIS B2312: Socket-Welding Pipe Fittings

JIS B2313: Malleable Iron Pipe Fittings

- Key ISO Standards:

ISO 15590-1: Petroleum and Natural Gas Industries - Pipeline Transportation Systems - Fittings

2. Chinese Standards

In China, the main standards for carbon steel pipe fittings are GB, JB, and HG. Each series serves different industries and applications:

GB (National Standards): Applied across various fields nationwide.

JB (Machinery Industry Standards): Suitable for the machinery manufacturing sector.

HG (Chemical Industry Standards): Applicable to the chemical manufacturing industry.

- Key GB Standards:

GB/T 1239.1: Carbon Steel Pipe Sockets for General Use

GB/T 12459: Steel Pipe Flanges and Pipe Fittings

GB/T 17185: Elbows, Tees, Reducers, and Caps

GB/T 9112: Universal Flanges

- Key JB Standards:

JB/T 81: Carbon Steel Socket Standards

JB/T 82: Steel Pipe Flanges and Pipe Fittings

JB/T 3573: Machinery Industry Elbows, Tees, and Crosses

- Key HG Standards:

HG/T 20592: General Steel Pipe Fittings for the Chemical Industry

HG/T 20615: Chemical Industry Standards for Steel Pipe Flanges and Fittings

HG/T 20623: Common Flange Standards for the Chemical Industry