Stainless Steel Pipe Flange
Product Overview
A Stainless Steel Pipe Flange is a forged or cast ring used to connect piping sections, valves, or pumps within defined pressure ratings.
Technical Specifications
|
Parameter Category |
Technical Parameter |
Typical Specification / Value |
|
General |
Product Name |
Stainless Steel Pipe Flange |
|
Manufacturing Standard |
ASME B16.5 / ASTM A182 |
|
|
Size & Structure |
Nominal Diameter (NPS) |
2" (DN50) |
|
Flange Type |
Welding Neck (WN) |
|
|
Facing Type |
Raised Face (RF) |
|
|
Outside Diameter (D) |
150 mm (6.00") |
|
|
Thickness (t) |
17.5 mm (0.69") |
|
|
Hub Diameter (X) |
84 mm (3.31") |
|
|
Bore Diameter (B) |
52.5 mm (2.07") |
|
|
Length Through Hub (Y) |
68 mm (2.69") |
|
|
Bolt Data |
Number of Bolt Holes |
4 holes |
|
Bolt Hole Diameter |
19 mm (0.75") |
|
|
Bolt Circle Diameter (BCD/W) |
120.7 mm (4.75") |
|
|
Hole Alignment / Eccentricity |
≤0.8 mm |
|
|
Pressure Rating |
Pressure Class |
Class 150 |
|
Max Working Pressure |
19.0 bar (275 psi) @ 38°C |
|
|
Material Properties |
Material Grade |
ASTM A182 F316 / F316L |
|
Tensile Strength |
≥485 MPa (70 ksi) |
|
|
Yield Strength |
≥170 MPa (25 ksi) |
|
|
Hardness |
≤187 HBW |
|
|
Surface & Sealing |
RF Facing Roughness |
3.2–6.3 μm (125–250 AARH) |
|
Inspection |
NDT (Non-Destructive Testing) |
UT / PT |
Manufacturing & Capacity
Production Process
Forging: Induction-heated billets undergo multi-directional die forging to improve internal grain flow and density.
Heat Treatment: Solution annealing at 1040°C - 1150°C followed by water quenching forms austenitic microstructure.
CNC Machining: CNC lathes and multi-axis drills machine sealing faces and bolt holes according to drawing tolerances.
Capacity Data
Annual Capacity: 18,000 Metric Tons per year
Facility Area: 25,500 Square Meters
Forging Equipment: 2 Automated Lines (1600T & 4000T Hydraulic Presses)
Machining Equipment: 42 CNC Lathes, Mills, and Indexing Drilling Centers
Testing Infrastructure: In-house lab with Spectrometers (PMI), UT Flaw Detectors, and Tensile Testers
Compliance & Certification
|
Certification / Standard |
Scope of Compliance |
|
ISO 9001 |
Quality management system and production consistency |
|
PED 2014/68/EU |
Pressure equipment safety compliance for EU markets |
|
EN 10204 3.1 |
Material traceability and inspection certificates |
|
ISO 14001 & 45001 |
Environmental and occupational health & safety management |
|
TÜV / Lloyd's Register |
Third-party factory audit and product approval reports |
|
ASTM A262 |
Corrosion resistance verification for stainless steel |
Inspection & Testing
Ultrasonic Inspection
Volumetric testing identifies sub-surface flaws below 0.5% per acceptance criteria.
Surface Roughness Verification
Profilometers confirm 3.2–6.3 µm finishes to meet ASME B16.5 sealing criteria.
Dimensional Control
CMM indexing limits bolt-hole eccentricity to ≤0.8 mm for standard layout compliance.
Positive Material Identification (PMI)
XRF alloy verification confirms chemical composition and grade conformity.
Intergranular Corrosion Testing
Standard ASTM A262 Practice evaluations confirm solution annealing efficacy and grain structure compliance.
Hydrostatic Testing
Pressure containment verifications confirm structural integrity under standard proof test loads.
Industrial Applications
|
Application Field |
Typical Use |
Key Benefits |
|
Petrochemical Industry |
Connecting high-pressure refinery pipelines and distillation systems |
Corrosion resistance under high-pressure hydrocarbons |
|
Water Treatment |
Joining desalination pipelines and high-flow pumping systems |
Oxidation resistance in high-flow treated water |
|
Food & Beverage |
Connecting sanitary processing lines and storage/mixing tanks |
Surface finish compliant with sanitary standards |
|
Marine Engineering |
Securing offshore platforms and seawater cooling pipelines |
Chloride pitting and crevice corrosion resistance |
|
Power Generation |
Connecting steam turbine lines and boiler feedwater systems |
Used in high temperature and pressure conditions |
Supply Chain & Logistics
Export Packaging
Seaworthy wooden cases with internal moisture-barrier wrapping compliant with international shipping standards.
01
Raw Material Inventory
Standard forging billet safety stock buffers production schedules against lead-time volatility.
02
Customs Compliance
Complete export documentation matches regulatory requirements for customs clearance at global ports.
03
Real-Time Tracking
Integrated logistics systems provide transparent milestone monitoring from dispatch to delivery.
04
Flexible Shipping Options
Established partnerships support varied LCL, FCL, and air freight transport requirements.
05
FAQ
Q: Can you provide Mill Test Certificates according to EN 10204 3.1?
A: Yes, original material test certificates specifying chemical composition and mechanical properties accompany every shipment.
Q: What is the typical lead time for a standard 20ft container order?
A: Production and packaging generally require 30 to 45 days, depending on specific size mixing.
Q: Do you accept third-party inspections by SGS or BV at your factory?
A: We accommodate external inspectors for dimensional checks, visual evaluations, and material witness testing.
Q: How do you protect the raised faces from damage during international transit?
A: Sealing faces receive rust-preventative oil coating and heavy-duty plastic caps before packing into wooden cases.
Q: Can you manufacture non-standard dimensions based on custom technical drawings?
A: Our engineering team reviews custom blueprints to match specific tolerance and machining profile requirements.
Q: What marking methods are used for size, pressure rating, and heat numbers?
A: Flanges undergo clear, permanent low-stress stamp marking along the outer rim profile per ASME criteria.
Q: Are the weld necks pre-beveled to specific scheduling thicknesses like Schedule 40S?
A: Yes, we machine the weld ends to match your specified pipe wall thickness schedule precisely.
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