Product Knowledge of 304 Stainless Steel Welded Pipes

Q1: What is the core difference between 304 stainless steel welded pipes and seamless pipes?

A1: The core differences lie in production process and performance. Welded pipes are made by welding process, with welds, low price and complete specifications; seamless pipes are made by seamless process, without welds, high strength, strong pressure-bearing capacity and high price, suitable for different pressure and scenario needs.

Q2: What are the common specifications of 304 stainless steel welded pipes?

A2: The common outer diameter for foreign trade is 10mm-273mm, and the wall thickness is 1mm-6mm. Among them, the demand for welded pipes with outer diameter of 15mm-114mm and wall thickness of 1.5mm-3mm is the largest. Special specifications can be customized on demand, which are suitable for decoration, pipeline transportation and other scenarios.

Q3: What are the welding methods for 304 stainless steel welded pipes?

A3: The common welding methods for foreign trade are argon arc welding, submerged arc welding and resistance welding. Among them, argon arc welding has the best welding effect, with flat and firm welds, and the corrosion resistance is close to the base metal, suitable for mid-to-high-end decoration and industrial scenarios; resistance welding has high efficiency, suitable for mass production.

Q4: What are the main foreign trade export application scenarios of 304 stainless steel welded pipes?

A4: They are mainly used in architectural decoration (guardrails, handrails, doors and windows), pipeline transportation (tap water, air, natural gas), home appliance manufacturing (air conditioning pipelines, refrigerator pipelines), simple equipment connection, etc., and are the most cost-effective stainless steel pipes in foreign trade.

Q5: Are the welds of 304 stainless steel welded pipes easy to rust?

A5: Under normal circumstances, they are not easy to rust. After argon arc welding, the welds are polished, and the corrosion resistance is close to the base metal. However, if the welding process is poor, the polishing is not in place, or they are in a humid and salty environment for a long time, rust spots may appear on the welds. Strict control of welding and polishing quality is required in foreign trade.