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High-Quality Socket Weld Fittings: Precision Manufacturing for Reliable Piping Connections
1. Precision Engineering for Critical Applications
Haihao Group delivers a full range of socket weld fittings designed for high-pressure and high-temperature piping systems. Each component is precisely manufactured to ensure secure, leak-free connections that can withstand the demanding conditions of oil & gas, petrochemical, and power generation industries.
Our product portfolio includes 45° and 90° elbows, equal and reducing tees, couplings, caps, and weldolets, available in both Class 3000# and 6000# ratings. Every fitting is produced according to ASME B16.11 and MSS-SP-97 standards to ensure dimensional accuracy and consistent performance.
ASME B16.11 and MSS SP-97 Socket Weld Fittings Manufactured by Haihao Group
2. Superior Materials for Strength and Durability
To meet the stringent requirements of modern piping systems, Haihao Group uses high-quality materials such as ASTM A105 and ASTM A350 LF2 Class 1.
For corrosive environments and offshore service, we also provide fittings that fully comply with NACE MR0175 standards, ensuring excellent resistance to sulfide stress cracking and corrosion fatigue.
All products are protected with anti-rust oil coating to maintain surface integrity during storage and shipment.
3. Comprehensive Product Range
| Product Type | Size Range | Pressure Class | Material | Standard | Surface Finish |
|---|---|---|---|---|---|
| 45° / 90° Elbows | ½”–1½” | 3000# / 6000# | A105 / LF2 | ASME B16.11 | Anti-rust oil |
| Equal & Reducing Tees | ¾”–1½” | 3000# / 6000# | A105 / LF2 | ASME B16.11 | Anti-rust oil |
| Couplings & Caps | ¾”–1½” | 3000# / 6000# | A105 / LF2 | ASME B16.11 | Anti-rust oil |
| Weldolets | ¾”×2″–1½”×12″ | 3000# / 6000# | A105 / LF2 | MSS-SP-97 | Anti-rust oil |
Each fitting undergoes precision machining, 100% dimensional inspection, and pressure testing to verify mechanical integrity and fit accuracy.
4. Certified Quality and Traceability
Haihao Group operates under a strict ISO 9001:2015 quality management system. Every batch is traceable from raw material to finished product, accompanied by mill test certificates (MTCs) in accordance with EN 10204 3.1 or 3.2.
Our in-house testing capabilities include:
- Visual & dimensional inspection
- Magnetic particle and ultrasonic testing
- Hydrostatic and hardness testing
- Impact testing for low-temperature LF2 materials
These ensure that every product meets both international standards and customer-specific requirements.
5. Why Choose Haihao Group
With decades of manufacturing expertise, Haihao Group has become a trusted global supplier of forged fittings and pipeline components.
We provide:
- Full compliance with ASME, ANSI, ASTM, and NACE standards
- Flexible production for customized specifications
- Proven track record in large-scale international projects
Haihao fittings are widely used in refineries, LNG plants, offshore platforms, and power systems, serving clients across more than 80 countries.