Carbon Steel Flange
Products Description
Product | carbon steel flange |
Manufacturing location | China |
Manufacturing standards | ASME B16.5, MSS SP 44 |
Material grades | ASTM A105, A694 F42, F52 |
Products Introduction
Carbon steel flanges are key connecting components in piping systems for valves, pumps, pressure vessels, and
pipelines. Our flanges are manufactured from high-quality carbon structural steel using precision die forging or casting processes, followed by heat treatment and machining according to international standards.
Main applications:
Oil & gas transmission
Chemical and pharmaceutical piping
Power plant steam & cooling water systems
Shipbuilding & marine engineering
Municipal water supply & fire protection
Food & beverage (non-contaminating grade)
Flange Types & Comparison
Type | Connection | Neck | Strength | Typical Use |
|---|---|---|---|---|
Weld Neck (WN) | Butt weld | Long taper | ⭐⭐⭐⭐⭐ | High temp/pressure, main steam |
Slip-On (SO) | Fillet weld | Short/none | ⭐⭐⭐ | Low/medium pressure, water, air |
Socket Weld (SW) | Fillet weld (socket) | Short | ⭐⭐⭐⭐ | Small bore, high pressure |
Threaded (TH) | Threaded | None | ⭐⭐ | No-weld areas |
Blind (BL) | Bolted | None | ⭐⭐⭐⭐⭐ | Pipeline end sealing |
Lap Joint (LJ) | With stub end | None | ⭐⭐ | Frequent disassembly |
Orifice Flange | Butt weld / threaded | With tap holes | ⭐⭐⭐⭐ | Flow measurement |
Surface Protection
Treatment | Environment | Salt spray resistance |
|---|---|---|
Anti-rust oil | Indoor, dry | Short term |
Black paint | General outdoor | ~200 hrs |
Hot-dip galvanized | Humid / marine | 500-1000 hrs |
Yellow zinc plated | Mild corrosive | 96 hrs |
Epoxy coating | Chemical / acid | 1000+ hrs |
Quality Control & Testing
We followISO 9001:2015with optional tests:
★☆ Visual & dimensional inspection (100%)
☆★Magnetic particle (MT)
★☆ Ultrasonic (UT)
☆★Liquid penetrant (PT)
★☆ Radiographic (RT)
☆★Hardness test (HB/HRC)
★☆ PMI (spectrum analysis)
☆★Hydrostatic test
Packaging & Shipping
Method | Application |
|---|---|
Wooden case (ISPM 15) | Export to EU/US |
Steel strapping + pallet | Bulk land transport |
VCI film individually wrapped | Precision / high-value flanges |
Plywood case | Full container export |
Order Process & Lead Time
Drawing/standard → Technical confirmation → Quotation → Contract → Forging → Heat treatment → Machining → Testing → Coating → Packing → Shipment
Standard items: 3-5 days (stock)
Custom items: 7-15 days (small batch), 20-30 days (large batch)
