ASTM A403 Pipe Fittings

ASTM A403 pipe fittings are made from austenitic stainless steel as the raw material, and are manufactured by welding the pipes together.ASTM A403 steel pipe fittings have excellent corrosion resistance, high temperature strength, and low temperature toughness, and are widely used in various fields and industries for pipeline systems.

What Is ASTM A403 Standard

ASTM A403 standard specification for austenitic stainless steel materials, including various stainless steel grades such as 304, 316, 316L,321,904,31254 etc. The ASTM A403 specification the manufacturing, inspection, and testing requirements for stainless steel butt welding pipe fittings.It is classified and named according to the material type, size, and pressure rating of the pipe fittings to indicate their scope of application. In addition, the standard also specification the requirements for chemical composition, mechanical properties, heat treatment, surface treatment, etc.

The Types Of ASTM A403 Steel Pipe Fittings

According to Shapes：ASTM A403 pipe fittings include 90degree elbow, 45degree elbow, tee, cross, cap, concentric reducer, eccentric reducer, stub end, etc.These fittings can meet different pipeline layout and connection requirements.

According to Materials：ASTM A403 pipe fitings include WP304/304L、WP316/316L、WP904L、WP317/317L、WP31254、WP347、WP321,etc.It can adapt to the needs of pipeline applications in different working environments.

Chemical Properties

Mechanical Properties

Manufacturing Process And Advantages

Manufacturing Process

In the ASTM A403 standard, the manufacturing process of butt welded pipe fittings includes raw material preparation, cutting and processing, forging, welding, heat treatment, surface treatment, and other steps.During the manufacturing process, it is important to prevent material damage, oxidation, and decarburization to ensure the surface quality and performance of the product.

Heat Treatment：

The heat treatment of stainless steel pipe fittings mainly includes three processes: heating, holding, and cooling.These processes are interconnected and cannot be interrupted.The ASTM A403 standard clearly specifies the time and temperature of solution annealing and cooling methods for different grades of stainless steel materials.

Advantages：

Compressive strength

Corrosion resistance

Wide applications

Convenient maintenance

Highly durable

Long service life

ASTM A403 pipe fittings have excellent corrosion resistance, high temperature performance, low temperature toughness, good welding performance, and strict manufacturing processes. They are widely used in the fields of petroleum, chemical, and electric power.