Haihao Group Delivers ASTM A420 WPL6 Concentric Reducers for Low Temperature Pipeline Project in Kazakhstan
Haihao Group has successfully completed the delivery of ASTM A420 WPL6 concentric reducers for a pipeline project in Kazakhstan. The products were manufactured in strict accordance with ASME B16.9 and supplied with full documentation to meet international project requirements.
This shipment supports a low temperature pipeline system, where material toughness, dimensional accuracy, and welding reliability are critical to long-term operational safety.
Project Delivery Overview
- Product: Butt Weld Concentric Reducer
- Standard: ASME B16.9
- Material: ASTM A420 WPL6
- Size: 1 1/2″ × 2″ (40 × 50 mm)
- Wall Thickness: SCH40 × SCH40
- Manufacturing Process: Seamless
- Service Condition: Low temperature, non-sour
- Certification: EN 10204 Type 3.1
All concentric reducers were produced using a seamless process to ensure uniform wall thickness, smooth internal transition, and reliable performance under low temperature operating conditions.

ASTM A420 WPL6 concentric reducers SCH40 ASME B16.9 low temperature pipeline project shipment to Kazakhstan
Designed for Low Temperature Applications
ASTM A420 WPL6 is a proven low temperature carbon steel grade, widely used in pipeline systems operating in cold climates. For this Kazakhstan project, the material was selected to provide:
- Stable mechanical properties at low temperatures
- Excellent impact toughness
- Good weldability for butt-weld connections
- Long-term reliability in cold-region pipeline service
The concentric reducer design allows for smooth flow transition and balanced stress distribution, making it suitable for horizontal pipeline installations.
Compliance and Quality Assurance
All reducers were manufactured in compliance with ASME B16.9 and dimensional requirements of ASME B36.10M. During production, Haihao Group implemented a comprehensive quality control process, including:
- Chemical composition verification
- Mechanical testing
- Dimensional inspection
- Visual and surface examination
- Heat number traceability
Each product was delivered with EN 10204 Type 3.1 certification, ensuring full transparency and traceability for the end user.
Reliable Supply for International Projects
With extensive experience in supplying ASTM A420 WPL6 pipe fittings, ASME B16.9 concentric reducers, and other low temperature pipeline components,Haihao Group continues to support international oil & gas, energy, and industrial projects with stable quality and on-time delivery.
This successful shipment to Kazakhstan once again demonstrates Haihao Group’s capability to meet strict technical specifications and project schedules for overseas customers.

