​Discussion on Welding Quality Measures for 304 Stainless Steel Tube

Discussion on Welding Quality Measures for 304 Stainless Steel Tube

The adoption of appropriate welding methods, pre-welding preparations, structural design, welding techniques, and post-weld inspection controls are crucial for further enhancing the welding quality of stainless steel seamless tubes. The storage and processing sites for workpieces must meet specified requirements. To ensure the surface layer of the 304 Stainless Steel Tube is not damaged or contaminated, protection measures must be strengthened throughout each manufacturing process. Key aspects include:

Welding Quality Measures for Stainless Steel Seamless Tubes

The processing and manufacturing of 304 Stainless Steel Tube should be carried out on a dedicated production line (using wooden boards) to prevent direct contact with carbon steel processing platforms or hard ground surfaces. Special storage racks, which may be wooden or carbon steel supports with coated surfaces or padded with rubber sheets, should be used to isolate the tubes from carbon steel and other metals.  

During storage, the storage location should facilitate easy lifting and be relatively isolated from other material storage areas. Protective measures must be in place to prevent contamination by liquids, avoid collisions with other components, and protect against contamination and damage from ferrous metals. When lifting the 304 Stainless Steel Tube, specialized lifting tools such as slings or dedicated clamps must be used. The use of steel wires is strictly prohibited to prevent surface scratches. Additionally, impacts and collisions during lifting and placement should be avoided to prevent scratches.

If surface scratches, arc marks, or surface contamination occur during transportation, storage, or production, they must be promptly addressed. After grinding with an angle grinder, polishing should be performed using polishing discs or metallographic sandpaper. Due to the small diameter of hydraulic tubing, the operational difficulty is relatively high, and the requirements for both appearance quality and internal structure are stringent. These tubes must withstand high working pressures, making argon arc welding the primary operational method.

Design of Welded Joints: To ensure the welding quality of the 304 Stainless Steel Tube, butt joints are typically welded using a single-pass technique that forms both sides simultaneously, with argon gas shielding on the reverse side. For connections between pipes and waterproof sleeves, as well as between pipes and flanges (such as high-neck flanges), non-connected standpipe welds utilize fillet joints.