API 5L Annex H Sour Service Line Pipe

Specially manufactured and tested line pipe for wet H2S (sour) environments. Includes HIC and SSC testing per NACE standards for upstream sour gas and crude pipelines.

• Specification Details
  • Standard API 5L Annex H, ISO 3183, NACE MR0175 / ISO 15156
  • Grades Grade B, X42, X46, X52, X56, X60, X65
  • Manufacturing Type Seamless, HFW/ERW, LSAW (per project spec)
  • Key Testing HIC per NACE TM0284 (CLR, CTR, CSR), SSC 4-point bend per NACE TM0177, Hardness testing (max 248 HV10 / 22 HRC)
  • Chemistry Ultra-low sulfur (≤0.002% S), calcium treated, clean steel practice
  • Documentation Full HIC/SSC test reports with each heat

HIC Test Acceptance Criteria (Typical):

• Parameter Standard Limit Stringent Limit
• Crack Length Ratio (CLR) ≤ 15% ≤ 5%
• Crack Thickness Ratio (CTR) ≤ 5% ≤ 2%
• Crack Sensitivity Ratio (CSR) ≤ 2% ≤ 0.5%

Typical Applications:

• · Sour gas gathering and trunk lines
• · Pre-flash and inlet separation piping
• · Amine unit feed lines
• · Produced water with dissolved H2S