HIC Tested ASTM A234 WPB Fittings Shipped for USA Sour Service Project
Industrial piping systems deployed in sour hydrocarbon environments demand rigorous material stability and anti-corrosion performance. Haihao Group has successfully delivered a full batch of custom butt-weld pipe fittings tailored to strict NACE and AXENS specifications, supporting a key industrial piping upgrade project in the United States. All delivered units areASTM A234 WPB NACE fittings, fully optimized for wet hydrogen sulfide service and hydrogen-induced cracking resistance.
Heat-treated ASTM A234 WPB NACE MR0103 butt weld fittings, HIC tested elbows tees reducers with AXENS IN 043 standard for USA sour service piping
Full Product Technical Specification
| Product Type | Size & Wall | Standard | Material | Anti-Corrosion Grade | Chemical Control |
| 90° Long Radius BW Elbow | 2” XS | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 2 (HIC Resistant) | P≤0.025%, S≤0.020% |
| 90° Long Radius BW Elbow | 2” XS | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 1 (Wet H₂S Resistant) | P≤0.025%, S≤0.020% |
| 45° Long Radius BW Elbow | 2” XS | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 2 (HIC Resistant) | P≤0.025%, S≤0.020% |
| 90° Long Radius Elbow | 3/4” XXS | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 2 (HIC Resistant) | P≤0.025%, S≤0.020% |
| Equal Tee / Reducing Tee BW | 0.5”~2”, XXS/XS/SCH160 | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 1 & Category 2 | P≤0.025%, S≤0.020% |
| Eccentric / Concentric Reducer BW | 3/4”~3”, XS/XXS/SCH160 | ASME B16.9 / NACE MR0103 | ASTM A234 WPB | Category 1 & Category 2 | P≤0.025%, S≤0.020% |
This customized batch covers comprehensive butt-weld fitting types, including 45°/90° long radius elbows, equal & reducing tees, concentric and eccentric reducers. Sizes range from 0.5 inch to 3 inches, with heavy wall specifications including XS, XXS and SCH160, covering most conventional heavy-duty pipeline transition and turning requirements. Every ASTM A234 WPB NACE fitting is seamless carbon steel construction, manufactured in full compliance with ASME B16.9 dimensional standards.
What differentiates this batch from standard piping fittings is its dual-grade anti-corrosion classification, fully aligned with AXENS IN-043 (2020) technical specifications. Part of the ASTM A234 WPB NACE fittings are certified Category 1 for superior wet H₂S corrosion resistance, while the rest meet Category 2 standards for strict hydrogen-induced cracking prevention. This graded configuration enables targeted adaptation to different corrosive zones of the on-site pipeline network.
To guarantee reliable HIC resistance and stable mechanical properties, we implemented ultra-strict chemical composition control for all ASTM A234 WPB NACE fittings. The maximum phosphorus content is strictly limited to 0.025% and sulfur content controlled within 0.020%, minimizing impurity elements that trigger cracking failure in sour service environments. Complete heat treatment is conducted for every fitting to refine internal microstructure and eliminate residual stress.
For client third-party verification and HIC testing procedures, Haihao Group supplied two dedicated furnace test blocks alongside the finished fittings. These test blocks undergo synchronous heat treatment with formal products, ensuring consistent material properties for accurate HIC testing and physical & chemical performance detection. This traceable quality control method fully meets the rigorous acceptance standards of US industrial projects.
Haihao Group specializes in high-standard sour service pipe fittings for North American energy and chemical projects. We provide customizedASTM A234 WPB NACE fittings with graded anti-corrosion performance, ultra-low impurity control and complete test documentation, delivering stable and compliant piping solutions for complex corrosive working conditions.