asme b16.Overview of the production process of forged steel socket welded pipe fittings under the 11 standard:
1. Raw material procurement and inspection
Select ASME B16 compliant11. Specified high-quality steel raw materials, such as carbon steel, alloy steel or stainless steel, etc.
Raw materials are tested for chemical composition and mechanical properties to ensure that they meet the requirements of the standard.
2. Forging and forming
Cutting and heating: The selected raw material is cut to the desired size and heated to the appropriate forging temperature in an electric or gas furnace.
Forging: The heated steel is forged by a press or forging hammer to form the basic shape of socket welded pipe fittings (e.g. flanges, elbows, tees, etc.).
Molding processingAccording to the design drawings and dimensional requirements, the shape and size of the forging parts are further refined to ensure geometric accuracy and surface quality.
3. Heat treatment
After the initial forming, the necessary heat treatment processes such as annealing, normalizing or quenching and tempering are carried out to adjust the microstructure and mechanical properties of the material.
Fourth, machining
Perform machining, including lathes, milling, drilling, etc., to ensure that the inner and outer diameters, threads and other critical dimensions of the pipe fitting are accurate.
For the socket part, precision machining is carried out to ensure a good fit and tightness with the inserted tube.
5. Preparation for welding
Clean the area to be welded, remove scale, burrs and oil stains, and prepare it for socket welding.
6. Socket welding
The pretreated tube is inserted into the machined socket and the socket weld connection is completed by argon arc welding, submerged arc welding or other welding methods that meet the standards.
7. Non-destructive testing
According to ASME B1611. Non-destructive testing of welding parts, such as radiographic flaw detection (RT), ultrasonic flaw detection (UT), magnetic particle flaw detection (MT) or penetrant flaw detection (PT), to ensure that the welding quality is qualified.
8. Surface treatment and coating
Surface treatment is carried out on the welded pipe fittings, such as polishing, pickling passivation, sandblasting and rust removal, etc., to improve corrosion resistance and appearance quality.
If necessary, it can be painted and anti-corrosion treatment according to user requirements or standard regulations.
9. Dimensional inspection and performance testing
Check all dimensions for ASME B1611 standard tolerance requirements, and mechanical property tests are carried out at the same time, such as hardness test, tensile test, impact test, etc.
10. Final inspection and marking before leaving the factory
Label the product with the corresponding material grade, specification size, manufacturer name, batch number and other information, in accordance with ASME B1611 Identification requirements in the standard.
After a thorough quality control review, qualified products can be packaged and ready to ship.
The above is based on ASME B16An overview of the production process of 11 standard forged steel socket welded pipe fittings. In the actual production process, all steps need to strictly follow the relevant standards and operating procedures to ensure the quality and safety performance of the product.