904L super austenitic stainless steel industrial welded pipes

904L is a super-austenitic stainless steel with very high corrosion resistance, especially in environments containing chloride ions. This material contains a high nickel and molybdenum content, and moderate amounts of copper, which gives it excellent corrosion resistance in acidic, alkaline, and saline environments.904L stainless steel is widely used in chemical industry, petroleum, paper making, food processing, Marine engineering and other industries.

product details

Raw material selection

Use 904L stainless steel sheet or strip for ASTM A312 / A312M or EN 10216-5 standards.

Molding

Process sheet or strip into pipe shape by cold rolling or cold drawing process.

Welding

Using TIG (tungsten pole argon arc welding) or MIG (metal inert gas protective welding). The welding parameters need to be strictly controlled during the welding process to ensure the weld quality.

Heat treatment

After welding, solid solution treatment may be required to restore the corrosion resistance and mechanical properties of the material.

Inspection and inspection

Conduct nondestructive testing of the welded pipe, such as ultrasonic detection, radiographic detection, etc., to ensure that the weld is without defects. Mechanical properties testing and corrosion resistance tests are performed simultaneously.

Surface treatment

According to the need, the welded pipe surface treatment, such as pickling, passivation, etc., to improve the corrosion resistance.

Packaging and delivery

Packaging qualified welded pipes to ensure no damage during transportation.

904L stainless steel welded pipe is ideal in many industrial applications because of its excellent corrosion resistance. When selecting and using these materials, ensure that the appropriate standards and specifications are followed to ensure the performance and safety of the materials. At the same time, because the price of 904L stainless steel is relatively high, so in the selection of materials, should be considered according to the actual application needs and cost benefit.