Shanxi Xinshunda Flange Manufacturing Co., Ltd. supplies high-precision KS B1503 5K flanges engineered for low-pressure Korean standard piping systems. Fully compliant with KS B1503 (compatible with JIS B2220), our 5K flanges feature stable dimensions, easy installation, reliable sealing and cost-effective performance. With 19 years of forging and machining expertise, we provide trusted flange solutions for Korean, Japanese, Southeast Asian and global markets.
Product Description
KS B1503 5K flange is a low-pressure steel pipe flange defined by Korean industrial standard KS B1503, with a pressure rating of 5K (0.5 MPa / 72.5 psi). It is widely used in water supply, HVAC, fire protection, marine, general industry and utility pipelines. Our 5K flanges are precision forged and CNC machined to meet standard dimensions, ensuring perfect interchangeability and long service life.
Product Feature and Application
Key Features
- Full compliance with KS B1503 standard dimensions
- 5K low-pressure rating for economical general applications
- High dimensional accuracy and good interchangeability
- Smooth sealing face ensures stable connection
- Easy installation and maintenance
- Suitable for carbon steel and stainless steel pipelines
- Compatible with Korean & Japanese standard valves and fittings
Main Applications
- Municipal water supply and drainage pipelines
- HVAC, heating and compressed air networks
- Fire protection and utility piping systems
- Marine and shipbuilding auxiliary pipelines
- General industrial low-pressure fluid lines
- Korean, Japanese and Southeast Asian market projects
- Construction, civil engineering and auxiliary piping
Product Parameter
| Standard | KS B1503 (5K rating), matching JIS B2220 |
| Pressure rating | 5K (0.5 MPa / 72.5 psi) |
| Nominal diameter | 10A – 1000A (DN10 – DN1000) |
| Types | Slip–on, Weld Neck, Blind, Plate, Threaded |
| Face type | Flat Face (FF), Raised Face (RF) |
| Surface roughness | Ra 1.6–3.2 μm |
|
Materials |
Carbon steel: SS400, S235JR, A105 Stainless steel: STS304, STS316, 304L, 316L |
| Working temperature | −10 °C – 200 °C |
| Certification | EN 10204 3.1 Material Test Certificate |
Production Details
Each KS B1503 5K flange is manufactured under strict quality control:
- Raw material inspection with mill certificates and spectral analysis
- Precision forging or plate forming per KS B1503 standard
- CNC machining for accurate OD, PCD, bolt holes and facing
- 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 traceability from raw material to finished product
Production Display
Our ISO 9001 certified factory is equipped with full sets of forging lines, CNC machining centers, heat treatment furnaces and professional testing laboratories. The whole production process is traceable. We support third–party inspection by SGS, BV, TÜV as customer request.
Packaging & Transportation
- Surface treatment: Anti corrosion oil, varnish or black paint
- Packaging: Plastic film, woven bag, export–grade wooden case, steel pallet
- Labeling: Size, pressure, material, standard, heat number, batch
- Documents: Commercial invoice, packing list, certificate of origin, material test report
- Transportation: Sea, air and express delivery to over 70 countries
After-sales Service
We provide full life cycle technical support for KS B1503 5K flanges:
- Professional consultation on selection, installation and welding
- Custom sizes, materials and drilling per customer drawings
- Timely response to after-sales inquiries and quality claims
- Remote technical guidance and on-site support
- Long-term stable supply and inventory for large projects
Why Choose Shanxi Xinshunda?
- 19 years of professional flange manufacturing experience
- Full compliance with KS B1503 and international standards
- Complete 5K size range 10A–1000A with fast delivery
- Strict quality control and complete testing documents
- Direct factory price with stable lead times
- Multilingual service and global logistics support
Contact us today for catalog, quotation or customized solutions of KS B1503 5K flanges.
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