1. Material Standards & Grades

Primary Standards:

• ASTM A312/A312M - Seamless Austenitic Stainless Steel Pipes

• ASTM A213/A213M - Seamless Ferritic and Austenitic Steel Boiler Tubes

• GB/T 14976 - Stainless Steel Seamless Pipes for Fluid Transport

• EN 10216-5 - Seamless Stainless Steel Tubes for Pressure Purposes

Common Material Grades:

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Physical Properties

5. Manufacturing Processes

Primary Methods:

• Hot Finished: For larger diameters and thicker walls

• Cold Drawn: For precise dimensions and better surface finish

Process Flow:
Billet Inspection → Heating → Piercing → Elongation → Sizing
→ Heat Treatment → Straightening → Cutting → Testing → Inspection

6. Technical Specifications

7. Heat Treatment

8. Testing & Inspection

Standard Tests:

• Hydrostatic Test / Nondestructive Electric Test

• Ultrasonic Testing

• Eddy Current Testing

• Flattening Test

• Flaring Test

• Mechanical Properties Test

• Intergranular Corrosion Test (ASTM A262)

Optional Tests:

• Positive Material Identification (PMI)

• Macro Examination

• Microstructure Examination

• Grain Size Determination

9. Applications

Industrial Applications:

• Oil & gas pipelines

• Chemical processing equipment

• Power plant boilers and heat exchangers

• Pharmaceutical and food processing

• Automotive and aerospace

• Marine and offshore platforms

Quality Assurance:

• Complete traceability from raw material to finished product

• Third-party inspection available

• Material test certificates provided

• Compliance with international standards

Technical Advantages:

• No weld seam, uniform structure throughout

• Superior pressure-containing capability

• Excellent for high-temperature service

• Consistent mechanical properties

• Better corrosion resistance in aggressive environments

All pipes are supplied with complete documentation and meet relevant international standards and customer specifications.