GB/T 14976 ASTM A269 A312 Seamless Stainless Steel Pipes DN6 - DN1200

• Customization: Available
• Application: Chemical Industry, Oil and Gas Industry, Building Material
• Certification: CE, ISO9001
• Model NO.: Seamless Stainless Steel Pipes for Fluid Transport
• Length: Max 50m
• Material: 304/316/321/317
• Outer Diameter: 3.18-810mm
• Type: Seamless Pipe
• Wall Thickness: 0.2-40mm
• Steel Grade: Tp316/Tp321/Tp410/Tp316ln/Tp317L/Tp321
• Technique: Hot Rolled/Cold Drawn
• Shape: Round//Customized
• Process: Polished/Solution Treatment
• Condition: Hot Finished/Cold Finished
• End: Plain End/Bevel End
• Usage: Heat Transfer
• Test: BV, SGS Is Available
• Stock: Size Can Customized
• Processing: Customized
• Thickness: 1-150mm
• Used: Factory, Decoration, Food
• Packing: Standard Export Packing
• Delivery Time: 10-30 Working Days
• Size: 1/4"-4"
• Transport Package: Woven Bag/Wooden Case
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10, 000, 000 Kgs/Year

Product Description

Product Description

1. Material Composition & Mechanical Properties (Table)

Property	Value
Chemical Composition	Carbon (C): ≤0.08%, Chromium (Cr): 17.0-19.0%, Nickel (Ni): 8.0-11.0%,
	Molybdenum (Mo): ≤0.75% (optional), Manganese (Mn): ≤2.0%, Silicon (Si): ≤1.0%,
	Phosphorus (P): ≤0.035%, Sulfur (S): ≤0.030%, Nitrogen (N): ≤0.10%
Mechanical Properties	Tensile Strength (Rm): ≥515 MPa (74,700 psi)
	Yield Strength (Rp0.2): ≥205 MPa (29,700 psi)
Heat Treatment	Solution-annealed at 1040-1100°C followed by rapid cooling (water or air quench)

 

2. Key Applications

• Chemical & Petrochemical: Corrosion-resistant pipelines for acids, alkalis, and high-purity fluids.

• Food & Beverage: Hygienic tubing for sanitary liquid transport and processing systems.

• Pharmaceutical: Sterilizable and non-reactive piping for drug production and biotech facilities.

• Oil & Gas: High-pressure fluid transport in refineries and offshore platforms.

• Heat Exchangers: Condenser and boiler tubes in thermal power plants and industrial systems.

 

3. Manufacturing Standards

• Complies with GB/T14976: Chinese national standard for seamless stainless steel tubes for fluid transportation.

• Equivalent to ASTM A312/A312M (e.g., TP304/304L) and EN 10216-5 for material performance.

• Meets ISO 9001 and CE Marking requirements for quality assurance and international trade.

 

4. Testing & Certification

• Hydrostatic Testing: Pressure-tested to 1.5× working pressure to ensure leak-free performance.

• Non-Destructive Testing (NDT): Eddy current, ultrasonic (UT), or liquid penetrant inspection for defect detection.

• Chemical Analysis: Verified via optical emission spectrometry (OES) or X-ray fluorescence (XRF).

• Mechanical Testing: Tensile, hardness (HV), and flattening tests for quality validation.

• Certifications: GB/T14976-compliant Mill Test Reports (MTRs), ISO 9001, and CE documentation.

 

5. Advantages

• High Corrosion Resistance: Excellent resistance to oxidation, pitting, and general corrosion in acidic/alkaline environments.

• High-Temperature Durability: Maintains structural integrity at temperatures up to 400°C (750°F).

• Hygienic Performance: Smooth internal surface ideal for sanitary and ultra-clean applications.

• Ease of Fabrication: Compatible with standard welding (TIG, MIG) and bending processes.

• Cost-Effective: Balances performance and affordability for industrial fluid systems.

 

6. Surface Finish & Dimensions

• Surface: Pickled, polished, or bright-annealed finishes (Ra ≤1.6 µm for industrial use).

• Sizes: Outer diameter 6-630 mm (0.24-24.8"), wall thickness 0.5-30 mm (0.02-1.18").

Detailed Photos