Haihao Group Delivered ASME B16.9 ASTM A234 Pipe Fittings for Singapore Project

Haihao Group has successfully completed the production and shipment of a batch of ASME B16.9 ASTM A234 pipe fittings for a Singapore customer. The order included a wide range of butt weld fittings, such as equal tees, reducing tees, long radius elbows, concentric reducers, and eccentric reducers, manufactured according to international standards for industrial piping applications.

The supplied fittings covered different sizes, schedules, and material grades, including ASTM A234 WPB for general service applications and ASTM A420 WPL6 for low-temperature service conditions. With strict control of dimensions, heat treatment, surface finishing, and material performance, Haihao Group ensured that each fitting met the customer’s project requirements.

ASME B16.9 ASTM A234 pipe fittings manufactured by Haihao Group

Project Supply Overview

The order mainly consisted of carbon steel butt weld fittings manufactured according to ANSI/ASME B16.9 standards.

ASTM A234 WPB Fittings for Reliable Pipeline Connections

For this Singapore project, most fittings were manufactured from ASTM A234 WPB carbon steel, a commonly used material for pressure piping systems. The material provides good weldability, strength, and durability, making it suitable for oil & gas, petrochemical, power generation, and industrial pipeline applications.

The supplied ASTM A234 WPB fittings included large-diameter tees, elbows, and reducers, with sizes reaching up to 20 inches. During manufacturing, Haihao Group controlled forming accuracy, wall thickness tolerance, and end preparation to ensure smooth installation at the project site.

All fittings were processed with surface treatment requirements including sand blasting and grinding where required. The finished products were marked with identification bands and coated with clear protective paint before shipment.

Strict Quality Control for NACE and Low Temperature Requirements

Some fittings in this order were manufactured using ASTM A420 WPL6 material with NACE requirements for demanding environments.

For these products, Haihao Group applied additional quality controls, including:

• Heat treatment according to material requirements;
• Chemical composition control:

• C ≤ 0.23%;
• S ≤ 0.020%;
• P ≤ 0.025%;
• CE ≤ 0.43%;
  • NACE requirements:
• Sulfur content S ≤ 0.010%;
• Hardness ≤197 HBW;
• Low-temperature impact testing at -46℃;
• Impact energy average value ≥27J, minimum value ≥20J.

For specified fittings, a 300 mm witness test coupon was provided for material verification.

These inspection procedures help ensure that the fittings maintain stable mechanical performance in harsh operating conditions.

Precision Manufacturing of ASME B16.9 Butt Weld Fittings

Manufacturing accuracy is essential for butt weld fittings because dimensional deviation can affect welding quality and pipeline alignment.

For this shipment, Haihao Group controlled key requirements including:

• Elbow back arc percentage: 87.5%;
• Pipe end tolerance within specified limits;
• No spiral marks, die marks, grooves, or surface scratches;
• Sand blasting and surface repair before final inspection.

Through controlled forming processes and strict inspection procedures, Haihao Group delivered fittings that were ready for installation in industrial piping systems.

Why Choose Haihao Group for Industrial Pipe Fittings?

With more than 40 years of manufacturing experience, Haihao Group provides a wide range of piping products, including butt weld fittings, forged fittings, flanges, steel pipes, and customized pipeline solutions.

For international projects, Haihao Group supports customers with:

• Manufacturing according to ASME, ASTM, ANSI, EN, and other standards;
• Carbon steel, stainless steel, alloy steel, and special material options;
• Professional inspection and testing documentation;
• Customized marking, coating, and packaging solutions.

The successful delivery of this batch of ASME B16.9 ASTM A234 pipe fittings demonstrates Haihao Group’s capability to handle complex specifications and meet strict project requirements for global customers.

If you are looking for reliable pipe fittings for oil & gas, chemical, energy, or industrial piping projects, please contact Haihao Group for technical support and quotation.