Shanxi Xinshunda Flange Manufacturing Co., Ltd. supplies high-precision BS4504 PN10 weld neck flanges engineered for medium-pressure piping systems in general industry, water supply, HVAC, utilities and construction. Fully compliant with BS4504:1989 standards, our weld neck flanges provide excellent structural strength, stable sealing and long service life. Backed by 19 years of forging and machining expertise, we serve clients across Europe, Commonwealth, Middle East, Africa and global markets.
Product Description
BS4504 PN10 weld neck flange is a long hub tapered flange designed for butt-welding to pipes. It features a smooth transition from flange hub to pipe wall, effectively reducing stress concentration and improving fatigue resistance. Rated at 10 bar (PN10), it is widely used in medium-pressure fluid pipelines requiring high reliability and durability. Our BS4504 PN10 weld neck flanges are precision forged and CNC machined to meet standard dimensions, ensuring perfect interchangeability and stable performance.
Product Feature and Application
Key Features
- Fully compliant with BS4504 standard dimensions and tolerances
- PN10 medium-pressure rating for stable and reliable service
- Long tapered hub design reduces stress concentration
- Butt-weld structure ensures strong connection and good sealing
- High dimensional accuracy and full interchangeability
- Smooth inner bore for low flow resistance
- Excellent pressure, temperature and vibration resistance
- Suitable for long-term use in general industrial systems
Main Applications
- Municipal water supply and drainage pipelines
- HVAC, heating and circulating water systems
- Compressed air, gas and low-pressure fluid lines
- Fire protection and utility piping networks
- Construction, civil engineering and industrial plants
- European and British standard valve connections
- Global projects requiring BS4504 flanges
Product Parameter
| Standard | BS4504 |
| Pressure rating | PN10 (10 bar) |
| Nominal diameter | DN10 – DN2000 |
| Type | Weld Neck Flange (Butt Weld) |
| Face type | Raised Face (RF) |
| Surface roughness | Ra 1.6–3.2 μm |
|
Materials |
Carbon steel: S235JR, A105, C22.8, P250GH Stainless steel: 1.4301 (304), 1.4401 (316), 304L, 316L |
| Working temperature | −20 °C – 450 °C |
| Certification | EN 10204 3.1 Material Test Certificate |
Production Details
Each BS4504 PN10 weld neck flange is manufactured under strict quality control:
- Raw material inspection with mill certificates and spectral analysis
- Precision closed-die forging for optimized grain structure
- Controlled heat treatment for stable mechanical properties
- CNC machining for high accuracy of hub, face and bolt holes
- 100% dimensional inspection using calipers, gauges and CMM
- Visual inspection and optional MT/UT non-destructive testing
- Hydrostatic testing to verify pressure integrity
- Anti-corrosion oil coating and permanent marking
- Full material traceability from raw material to finished product
Production Display
Our ISO 9001 certified factory is equipped with advanced forging lines, CNC machining centers, heat treatment furnaces and professional testing laboratories. Full production process is traceable and documented. Third-party inspection by SGS, BV, TÜV is available upon request.
Packaging & Transportation
- Surface treatment: Anti-corrosion oil, varnish or black paint
- Packaging: Plastic film, woven bag, export wooden case, steel pallet
- Labeling: Size, pressure, material, standard, heat number, batch
- Documents: Commercial invoice, packing list, certificate of origin, MTC
- Transportation: Sea, air and express delivery to over 70 countries
After-sales Service
We provide full-life cycle technical support for BS4504 PN10 weld neck flanges:
- Professional consultation on selection, welding and installation
- Custom sizes, materials and drilling based on drawings
- Timely response to after-sales inquiries and quality claims
- Remote technical guidance and on-site support
- Stable long-term supply for large-scale projects
Why Choose Shanxi Xinshunda?
- 19 years of professional flange manufacturing experience
- Full compliance with BS4504 and EN1092-1 standards
- Complete PN10 size range DN10–DN2000 in stock
- Strict quality control and complete certification documents
- Direct factory price with stable lead times
- Multilingual sales & technical support and global logistics
Contact us today for catalog, quotation or customized solutions of BS4504 PN10 weld neck flanges.
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