ASME B16.11 Socket Weld Elbows and Threaded Pipe Caps Supplied to Singapore
Haihao Group has recently completed the delivery of a batch of ASME B16.11 forged fittings to a customer in Singapore, including 45-degree socket weld elbows and threaded pipe caps. These products are manufactured for Class 3000 pressure rating, using stainless steel, duplex stainless steel, and nickel alloy materials, fully compliant with NACE MR-0175 requirements.
The fittings are designed for high-pressure piping systems where reliability, corrosion resistance, and dimensional accuracy are critical.
Product Scope and Specifications
This shipment covers multiple forged fitting types commonly used in compact and high-integrity piping systems.
Supplied products include:
- 45° Socket Weld Elbow, Class 3000
- Threaded Pipe Cap (NPT End), Class 3000
Size range:
- 3/4″, 1″, and 1 1/2″
Applicable standard:
- ASME B16.11
Materials and Grades
Haihao Group selected materials according to service conditions and customer specifications:
- ASTM A182 Gr. F310H – austenitic stainless steel with excellent high-temperature strength
- ASTM A182 Gr. F51 (UNS S31803) – duplex stainless steel with balanced strength and corrosion resistance
- ASTM B366 UNS N06625 – nickel alloy offering outstanding resistance to pitting, crevice corrosion, and sour service environments
All nickel alloy and duplex stainless steel fittings meet NACE MR-0175 standards, making them suitable for sour gas and offshore applications.

ASME B16.11 45 degree elbows and threaded caps
Manufacturing Quality and Inspection
Each socket weld elbow and threaded pipe cap is produced through controlled forging processes to ensure uniform grain structure and mechanical integrity. Dimensional checks, threading accuracy, and pressure class verification are strictly performed in accordance with ASME B16.11.
Haihao Group provides complete quality documentation, including:
- Chemical composition reports
- Mechanical property test reports
- PMI (Positive Material Identification) reports
- NACE compliance confirmation
These measures ensure consistent performance in demanding operating conditions.
Typical Applications
The Class 3000 socket weld elbows and threaded pipe caps supplied in this order are widely used in:
- Oil & gas production and processing systems
- Offshore and marine piping networks
- Chemical and petrochemical plants
- High-pressure instrument and auxiliary piping
Their compact design and high pressure rating make them ideal for limited-space installations.
Reliable Forged Fitting Supplier for Global Markets
With extensive export experience, Haihao Group supplies ASME B16.11 forged fittings, socket weld elbows, and threaded pipe caps to customers worldwide. Our strict material control, NACE-compliant production, and comprehensive inspection system help international clients meet both project and regulatory requirements.
