Haihao Group Ships ASTM A420 WPL6 Long Radius Elbows to Poland
Haihao Group has recently completed the production and shipment of a batch of ASTM A420 WPL6 elbows for a customer in Poland. The order includes both 45-degree and 90-degree long radius elbows manufactured according to ASME B16.9 requirements.
These pipe elbows are designed for low-temperature service applications where reliable toughness, dimensional accuracy, and welding performance are required. The supplied products feature a 1.5D long radius (LR) design, which helps reduce pressure loss and turbulence in pipeline systems compared with short radius elbows.
The order includes multiple sizes ranging from 3/4 inch to 16 inch, with different wall thicknesses from 3.91 mm to 12.70 mm, covering both standard BW and EFW manufacturing processes. All elbows were produced with required heat treatment and strict dimensional control, including back arc tolerance requirements to ensure smooth installation at the project site.
Project Details of ASTM A420 WPL6 Elbows
The Polish customer required a complete range of butt weld elbows manufactured from ASTM A420 Grade WPL6 carbon steel, a material commonly selected for low-temperature piping systems due to its excellent impact toughness and mechanical properties.
The main specifications of this shipment are listed below:
| Product | Size | Wall Thickness | Material | Standard |
| 45 Degree Long Radius Elbow | 3/4″ – 16″ | 3.91 – 12.70 mm | ASTM A420 WPL6 | ASME B16.9 |
| 90 Degree Long Radius Elbow | 3/4″ – 16″ | 3.91 – 12.70 mm | ASTM A420 WPL6 | ASME B16.9 |
| Butt Weld Elbow (BW) | 3/4″, 1″, 2″, 4″ | 3.91 – 6.02 mm | ASTM A420 WPL6 | ASME B16.9 |
| EFW Butt Weld Elbow | 3″, 4″, 8″, 12″ | 5.49 – 9.53 mm | ASTM A420 WPL6 | ASME B16.9 |
Manufacturing Features of WPL6 Long Radius Elbows
The supplied ASTM A420 WPL6 elbows were manufactured using professional forming and welding processes according to ASME B16.9 dimensional requirements. The long radius design with a centerline radius of 1.5 times the nominal pipe diameter provides smoother flow characteristics, making these elbows suitable for demanding industrial pipeline applications.
During production, Haihao Group controlled key parameters including:
- Elbow angle accuracy for 45-degree and 90-degree configurations
- Outside diameter and wall thickness tolerance
- End preparation for butt welding connection
- Heat treatment requirements
- Surface quality and dimensional inspection
For this Poland project, the elbows were supplied with heat treatment and controlled back arc dimensions. The back arc requirement was maintained at 87.5%, while the upper deviation was controlled within 12.5%, ensuring consistent geometry and reliable field welding performance.
ASME B16.9 ASTM A420 WPL6 long radius 45 degree and 90 degree elbows manufactured by Haihao Group
Why Choose ASTM A420 WPL6 Material for Low Temperature Piping?
ASTM A420 WPL6 is a forged carbon steel fitting material specifically developed for low-temperature service. Compared with standard carbon steel fittings, WPL6 provides improved impact resistance under cold operating conditions.
Typical applications include:
- Oil and gas transportation pipelines
- LNG and cryogenic systems
- Petrochemical facilities
- Power generation projects
- Industrial process piping
The combination of ASTM A420 WPL6 elbow material and ASME B16.9 manufacturing standards allows these fittings to meet the requirements of projects where safety, durability, and long-term service performance are important.
Haihao Group’s Quality Control for Pipe Fittings
As an experienced manufacturer of industrial pipe fittings, Haihao Group follows strict inspection procedures for every international order. For this shipment, quality control activities included:
- Raw material verification
- Chemical composition testing
- Mechanical property inspection
- Dimensional measurement
- Heat treatment confirmation
- Non-destructive testing when required
- Final appearance inspection before shipment
Every batch of ASME B16.9 WPL6 elbows is supplied with complete inspection documentation to support customer project requirements and traceability.
Global Supply Experience for Industrial Pipeline Projects
With more than 40 years of manufacturing experience, Haihao Group supplies butt weld fittings, flanges, steel pipes, and customized pipeline components for customers worldwide. The company provides products according to international standards including ASME, ASTM, EN, DIN, and other industry specifications.
If you are looking for reliable ASTM A420 WPL6 elbows, ASME B16.9 butt weld fittings, or customized pipeline solutions, please contact Haihao Group for technical support and quotation.
FAQ
Q1: What is ASTM A420 WPL6 elbow used for?
ASTM A420 WPL6 elbows are mainly used for low-temperature piping systems in industries such as oil and gas, LNG, petrochemical, and power generation.
Q2: What standard applies to WPL6 butt weld elbows?
WPL6 butt weld elbows are commonly manufactured according to ASME B16.9, which specifies dimensions, tolerances, and testing requirements.
Q3: What is the advantage of a long radius elbow?
A long radius elbow with a 1.5D centerline radius provides smoother fluid flow, reduces pressure loss, and helps minimize turbulence in pipelines.
Q4: Can Haihao Group manufacture customized ASTM A420 elbows?
Yes. Haihao Group can manufacture customized carbon steel and alloy steel pipe fittings according to customer drawings, standards, sizes, and project requirements.