Carbon Steel A234 WPB Flange

Carbon Steel A234 WPB Flange is an industrial flange that is custom-manufactured according to project technical specifications. It is mainly used to achieve a reliable sealing connection between pipes, valves and equipment. 

Material Consistency Design:

Products are manufactured using carbon steel materials conforming to A234 WPB chemical composition requirements, ensuring material consistency for pipe fittings and flanges in engineering projects.

Controlled Forging and Heat Treatment Processes:

All products are manufactured according to standardized processes, including controlled forging and heat treatment:
Free forging or die forging
Normalizing or stress-relieving heat treatment (as per technical requirements)
Metallographic structure optimization to improve toughness and stability

CNC Precision Machining and Sealing Control:

All flange sealing surfaces and critical dimensions are machined using CNC equipment to ensure:
Compliance with ASME dimensional tolerances
Control of sealing surface flatness and roughness
Consistency for on-site installation interchangeability

Full-Process Traceability System:
Heat number identification management
Raw material mill material certificate association
Production batch record management
Heat treatment and inspection records
Material certification documents conforming to EN 10204 3.1 (by heat number) can be provided upon project request.

International Engineering Standards Compatibility
Products can be manufactured according to the following standards:
ASME B16.5 / B16.47
MSS SP-44
EN1092-1
DIN / JIS (as required by the project)
Ensuring compatibility with global EPC projects and industrial piping systems.

Material Verification

All raw materials are sourced from qualified steel mills and undergo the following verification processes:

Chemical composition analysis

Mechanical property retesting

Heat number consistency verification

Forging Process

Free forging or die forging processes are used to improve the material's:

Internal density

Metal flow continuity

Pressure bearing capacity

Heat Treatment

Normalizing or stress relief treatment is performed according to technical requirements to improve:

Metallographic structure

Material toughness

Weldability

CNC Machining

Machining scope includes:

Sealing surfaces (RF / RTJ / FF)

Bolt hole positioning

Internal holes and beveling

Ensuring compliance with ASME engineering dimensional requirements.

Surface Protection

Provided according to transportation and storage conditions:

Rust-preventive oil
Black spray coating
Hot-dip galvanizing (HDG)
Epoxy coating

Final Inspection

Each batch of products undergoes:

Visual inspection
Dimensional inspection
Material verification
Non-destructive testing (as required)

Raw Material Traceability
Each batch of materials retains its furnace number and material certificate, enabling complete traceability.

Process Quality Control
Key processes such as forging, heat treatment, and machining are recorded and controlled to ensure consistency.

Non-Destructive Testing (NDT) System
Testing can be performed according to the following standards:

ASME Section V
EN ISO Relevant Standards
Testing items include: PMI / UT / MT / Hardness Testing / Dimensional Inspection

Document Support
Available:
EN 10204 3.1 Material Certificate
MTC Material Report
Heat Treatment Records
Dimensional Inspection Reports
Third-Party Inspection Reports (SGS / BV / TÜV)

Oil refining and petrochemical process piping systems

Offshore and onshore oil and gas transportation systems

LNG receiving terminals and process auxiliary systems

Power plant boilers and steam systems

Seawater desalination and water treatment systems

Municipal water supply and transportation networks

Industrial pressurized fluid transportation systems

As a long-term supplier serving overseas wholesalers, inventory dealers, and EPC engineering companies, we support flexible customized production services.

Customization options include:

Custom flange types; Non-standard sizes and processing based on special drawings; Custom markings and brand logos; Custom packaging and export markings; Mixed-specification container consolidation services; Third-party inspection support; Small-batch trial orders and long-term project procurement.