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ASTM A312 TP316L Austenitic Stainless Steel Seamless Pipe for ASME BPV Code Stamp U

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ASTM A312 TP316L Austenitic Stainless Steel Seamless Pipe for ASME BPV Code Stamp U

Brand Name : YUHONG

Model Number : ASTM A312 TP316L

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 1000KGS

Price : Negotiable

Payment Terms : T/T, L/C

Supply Ability : 1500 tons per month

Delivery Time : 10days->

Packaging Details : Ply-wooden Case /Iron Case/ Bundle with plastic Cap

Material Grade : TP316L

Standard : ASTM A312

Hydrostatic Test : ASTM A999/A999M-18

Nondestructive Electric Test : ASTM A999/A999M-18

Test : Mechanical Test, Transverse Test, Longitudinal Tension Test, Flattening Test, ,

Application : ASME BPVC Pressure Vessel

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ASTM A312 TP316L Austenitic Stainless Steel Seamless Pipe for ASME BPV Code Stamp U

1. ​​Dimensional Tolerances for Tubing​​

​​ASME SA-999 Dimensional Tolerances​​

  • Precision cold-drawn seamless tubing per ASME SA-999

  • OD Tolerance: ±0.10 mm (for OD ≤ 25.4 mm)

  • Wall Thickness Tolerance: ±10% (minimum ±0.15 mm)

  • Straightness: ≤1.5 mm/m length


2. ​​Pitting Corrosion Resistance Certification​​

​​ASTM G48 Method A | NACE MR0175/ISO 15156 Compliance​​

  • Critical Pitting Temperature (CPT): ≥48°C (tested per ASTM G48 Method A)

  • Test Parameters:

    • 6% FeCl₃ solution at 48±1°C for 72 hours

    • Acceptance Criteria: ≤1.0 mdd weight loss

  • Qualified for Sour Service (H₂S environments) per NACE MR0175 Section MR0175 Table A.20


3. ​​Non-Destructive Examination (NDE) Assurance Protocol​​

A. ​​Hydrostatic Pressure Test​​

  • ​​Procedure​​: Per ASME Sec. VIII UG-99(m)

  • ​​Test Pressure​​: 1.5 × Design Pressure (MAWP)

  • ​​Duration​​: ≥30 minutes visual inspection (zero leakage acceptance)

  • ​​Documentation​​: ASME Form U-1 signed by AI

B. ​​Eddy Current Testing (ET)​​

  • ​​Standard​​: ASME Sec. V Article 8 (Mandatory Appendix II)

  • ​​Coverage​​: 100% tube length

  • ​​Equipment​​: Differential rotating probe system

  • ​​Calibration​​: ASME Calibration Tube Set P3-E2

  • ​​Defect Rejection​​: ≥5% wall loss indication

C. ​​Ultrasonic Testing (UT) Option​​

  • ​​Supplement Requirement​​: SA-688 Annex S4 (Austenitic Stainless Steel Tubing)

  • ​​Method​​: Automated straight-beam immersion UT

  • ​​Criteria​​: No indications exceeding DAC curve (20% DAC reference)

  • ​​Trigger Condition​​: If specified by purchaser order

ASTM A312 TP316L Austenitic Stainless Steel Seamless Pipe for ASME BPV Code Stamp U

 

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