Forged Carbon Steel Flanges
Product Overview
Forged Carbon Steel Flanges are piping components produced by forging and heat treatment, used to connect pipes, valves, and equipment in industrial pressure piping systems.
Technical Specifications
|
Category |
Key Parameter |
Specification (2" Class 150 WN RF) |
|
Pressure Rating |
Class |
Class 150 (up to 2500) |
|
Equivalent Rating |
PN |
PN 20 |
|
Material |
Grade |
ASTM A105 / A105N |
|
Standard |
Manufacturing |
ASME B16.5 |
|
Size |
NPS / DN |
2" / DN50 |
|
Type |
Flange Type |
Welding Neck (WN) |
|
Facing |
Surface Type |
Raised Face (RF) |
|
Dimensions |
Outside Diameter |
150 mm |
|
Thickness |
19.1 mm |
|
|
Raised Face Diameter |
92.1 mm |
|
|
Bore |
52.5 mm (Sch 40) |
|
|
Hub Base Diameter |
77.8 mm |
|
|
Hub End Diameter |
60.3 mm |
|
|
Overall Length |
68.3 mm |
|
|
Bolting |
Bolt Circle (PCD) |
120.7 mm |
|
Bolt Holes |
4 × Ø19.1 mm |
|
|
Alignment Tolerance |
≤ 0.8 mm |
|
|
Surface |
Finish |
Ra 3.2–6.3 μm |
|
Coating |
Anti-rust oil / varnish |
|
|
Testing |
Inspection |
UT / MT / hardness (as required) |
Forging & Manufacturing Capability
Using 2500-ton hydraulic forging presses and ring rolling mills for flange production.
Using multi-axis CNC turning centers for dimensional control in batch production.
Applying normalizing, quenching, and tempering to meet mechanical property requirements.
Annual capacity is about 15,000 tons for industrial supply.
Quality Control & Traceability
Checking sealing surface roughness by profilometer testing (Ra 3.2–6.3 µm).
Performing ultrasonic testing to detect internal forging defects.
Charpy V-notch impact testing at -46°C for low-temperature applications.
Flange pitch circle diameter (PCD) is controlled within ASME B16.5 limits.
Industry Applications
|
Industry |
Typical Use |
|
Oil & Gas Midstream |
Used in pipeline and pumping station connections |
|
Petrochemical Refining |
Used in process piping, reactors, and distillation systems |
|
Chemical Processing |
Joining chemical transfer lines and storage tank systems |
|
Power Generation |
Connecting boilers, steam lines, and cooling water systems |
|
Water Treatment |
Used in municipal supply networks and high-pressure pump systems |
|
Marine & Shipbuilding |
Used in fuel, ballast, and cargo piping systems on vessels |
Custom Engineering & OEM Support
Manufacturing based on customer drawings (CAD, SolidWorks, or PDF).
Non-standard dimensions including custom sizing, wall thickness, and facing finishes beyond ASME/EN standards.
Marking includes heat number, part number, and customer-required stamping.
Specialized Coatings: Application of specific rust-preventative oils, black painting, or hot-dip galvanizing per project demands.
Seaworthy wooden cases used for transport protection and storage.
International Certifications & Compliance
|
Certification / Standard |
Scope & Compliance Meaning |
|
ISO 9001:2015 |
Factory quality management system approval for standardized production and process control |
|
PED 2014/68/EU |
Mandatory EU compliance directive for pressure equipment and systems |
|
EN 10204 3.1 |
Material traceability with certified Mill Test Reports (MTR) |
|
API 6A / API 17D |
Oil & gas industry standards for high-pressure equipment applications |
|
CRN |
Canadian registration approval for pressure equipment used in pipelines |
|
AD 2000-W0 |
German-approved material certification for pressure vessel applications |
FAQ
Q: Do you accept third-party inspections like SGS, BV, or TÜV before dispatch?
A: Yes, third-party inspection (SGS, BV, TÜV) is supported for dimensional and material checks.
Q: What is your standard lead time for a 20-foot container order?
A: Production lead time is usually 30–45 days depending on order mix.
Q: Can you provide low-temperature impact testing for specific climatic projects?
A: Yes, Charpy V-notch testing is available at specified sub-zero temperatures per material specification requirements.
Q: How do you protect the raised face during sea freight transit?
A: Every raised face is protected with a plastic cap or plywood disc before outer wooden crate packing.
Q: Are your raw material heat numbers stamped directly onto the finished body?
A: Yes, each unit features hard-stamped heat numbers matching the corresponding material test report.
Q: Can you supply products with specific hardness limits for sour service?
A: Yes, we process items to meet NACE MR0175/ISO 15156 hardness restrictions when specified.
Q: What type of anti-rust oil do you apply for long-term warehouse storage?
A: We apply a light, transparent anti-rust oil or black varnish designed for multi-month transit and storage.
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