Stainless Steel Welded Pipe Procurement Guide
Stainless steel welded pipes are widely used in industries such as industry, construction, chemical industry, and food due to their corrosion resistance, excellent processing performance, and wide range of applications. When purchasing stainless steel welded pipes, technical requirements, application scenarios, and economic efficiency should be considered comprehensively.
1. Material selection of stainless steel welded pipes
Material | Features | Applicable scenarios |
304/304L | Good corrosion resistance and mechanical properties, high cost performance. | Food-grade pipes, interior decoration pipes. |
316/316L | Contains molybdenum components, corrosion resistance is better than 304, especially suitable for marine and chemical environments. | Chemical pipes, marine equipment, pharmaceutical equipment. |
201 | General performance, low price, suitable for non-high corrosion environment. | Low-cost decorative pipes, furniture pipes. |
321 | Good high temperature oxidation resistance, suitable for high temperature working environment. | High-temperature equipment pipes, such as heat exchangers and boilers. |
2. Specification selection
Parameters | Standard range | Recommended selection basis |
Outer diameter | 6mm - 610mm | Based on flow or design requirements |
Wall thickness | 0.5mm - 20mm | Consider pressure level and mechanical strength requirements |
Length | Usually 6m, customizable | Based on installation and transportation requirements |
3. Processing technology selection
● Straight seam welding (ERW): suitable for large diameter pipes with high production efficiency.
● Spiral welding: large diameter pipes used to transport fluids.
4. Confirm technical standards
Standards | Scope of application |
ASTM A249/A269 | Welded pipes for stainless steel boilers and heat exchangers. |
ASTM A312 | Standards for seamless and welded stainless steel pipes for high temperature and corrosive environments. |
GB/T 12771 | Chinese standard, stainless steel welded pipes for industrial fluid transportation. |
EN 10217-7 | EU standard, technical requirements for pressure-bearing welded stainless steel pipes. |
5. Procurement considerations
● Test report: require suppliers to provide material composition reports, welding performance test reports, etc.
● Sample trial: test small batch samples before purchasing in large quantities to see if they meet the requirements.
● Packaging and transportation: ensure that the pipe packaging is waterproof and impact-proof to avoid damage during transportation.
Welcome to contact Yangtze Steel for more product information and customized services. We will provide you with high-quality stainless steel welded pipe solutions.
