Weld Neck Flange (WN)
Pipe Flange
Widely used for high-pressure, high-temperature, cyclic and critical services such as refineries, power plants, steam and hydrocarbon process piping.
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Pipe flanges & fittings · Shandong, China
BORWEX, Precision Pipeline Fitting Solutions for Global Industry
Pipe flanges and fittings for oil & gas, chemical, power, machinery, shipbuilding and pharmaceutical industries — engineered to standard, exported worldwide.
- CARBON/STAINLESS STEEL/ALLOY STEEL/DUPLEX STEEL
- ASME/EN/GB/SH/GOST/JIS/KS
- DN15–DN2000
About us
A modern enterprise built around pipe flanges & fittings
BOSWE Industry is a modern enterprise specializing in pipe flanges and fittings, serving industrial sectors including oil and gas, chemical, power, machinery, shipbuilding, pharmaceutical and other related industries on a long-term basis.
Our product range comprises plate flanges (PL), slip-on flanges (SO), weld neck flanges (WN), lap joint flanges (LJ), threaded flanges (TH), blind flanges (BL), elbows, tees, crosses, reducers, pipe caps, stub ends, etc, with optional materials of carbon steel, stainless steel, alloy steel or dual-phase steel, which exported to the Middle East, Southeast Asia, Africa, North America and other countries and regions.
Equipped with intelligent production lines, smart temperature control systems, 6-axis robotic handling equipment and MES digital management system, BOSWE Industry achieves full-process automation and data integration, with product qualification rate >99%.
- 20
- Years of casting & forging experience
- >99%
- Product qualification rate
- 7 days
- Custom mold development lead time
- 100%
- Traceable material batch records
Company values
The principles behind every deal
Benevolence
Respect partners, purchase long-term win-win cooperation
Righteousness
Uphold business ethics, refuse cutting corners and improper profits
Propriety
Respect contracts and business etiquette, observe agreed rules
Wisdom
Keep improving technology & expertise, provide professional solutions
Trustworthiness
Honor every commitment, deliver as promised
Product range
Flanges & fittings, engineered to standard
Plate Flange (PL)
Pipe Flange
Applied in low-pressure non-critical piping, water supply, sewage and general utility lines. Not recommended for high pressure or heavy vibration.
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Slip-On Flange (SO)
Pipe Flange
Suitable for low to medium pressure systems, fire protection, compressed air and general industrial piping.
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Lap Joint Flange (LJ)
Pipe Flange
Ideal for expensive alloy piping, corrosive service and lines requiring frequent disassembly, such as food & chemical processing.
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Blind Flange (BL)
Pipe Flange
Used for pipeline termination, vessel manholes, future branch connections and temporary isolation of process systems.
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Socket Weld Flange (SW)
Pipe Flange
Mainly for small-bore (≤DN50) high-pressure instrument and hydraulic lines.
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Threaded Flange (THD)
Pipe Flange
Applied to small-bore, low-pressure piping in fire-risk zones where welding is forbidden, such as compressed air and water utilities.
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Orifice Flange (ORF)
Pipe Flange
Commonly installed on metering loops in refineries, chemical plants and power stations for flow instrumentation.
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Reducing Flange
Pipe Flange
Used in compact piping layouts for equipment nozzles, pump and valve connections where pipe size transition is required.
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Manufacturing process
Twelve steps from steel ingot to finished fittings
A controlled line — cutting, forging, heat treatment, CNC machining and inspection — keeps every batch traceable to its material records.
01
Raw material cutting
02
Material feeding
03
Descaling
04
Forging
05
Ring rolling forming
06
Shaping
07
Heat treatment
08
CNC rough & finish machining
09
High-speed CNC drilling
10
Inspection & testing
11
Marking
12
Export packaging
Applications
Built for demanding service conditions
From high-pressure oil & gas mains to sanitary process lines, our flanges are selected for the media, pressure class and sealing face each system demands.
View all applications
01
Oil and Gas Pipeline System
02
Chemical Plant Process Piping System
03
Thermal Power Plant Piping System
04
Offshore Platform Piping System
05
Industrial Plant High-Temperature Process Piping System
06
Food & Pharmaceutical Cleanroom Process Piping System
07
Marine Engine Room Piping System
Why choose us
Evidence, not claims
Stable Raw Material Supply
- Stable raw material supply chain with controllable price fluctuations.
- Stable, long-term cooperative relationships with multiple certified raw material manufacturers.
- Locking raw material resources in advance and maintaining appropriate inventory reserves to avoid supply fluctuations caused by market volatility.
- Consistent raw material quality and reliable lead times help us fulfill your orders on time and sustain your project progress.
Qualification Compliance
- Full international certifications: ASME B16.5, ASME B16.47, EN1092, GOST 33259, JIS B2220, KS B1503.
- ISO 9001 and CE certificated.
- MTC 3.1/3.2 material test certificates and third-party NDT reports (UT, MT, PT).
- Material reports and furnace number tracking — full traceability, no material mixing.
Strong Processing Capability
- Forging, heat treatment and machining lines — integrated production from steel ingot to finished product.
- Standard and custom flanges manufactured according to drawings.
- Carbon steel, stainless steel and alloy steel available.
- Custom services: non-standard flanges, special sizes, special alloys, drawing customization, sample service.
Strict Quality Control
- Full strict inspection for raw material, forging, heat treatment, dimension and sealing face.
- Strict dimensional tolerance control.
- Precision machining of sealing faces (RF/FF/RJ/TG) to reduce rework and leakage risk.
- Non-conforming product isolation with full traceability.
Delivery Capacity
- Large stock of standard carbon steel and stainless steel flanges for fast shipment.
- Clear production schedules for custom orders to ensure on-time delivery.
- Expedited production can be negotiated for urgent project orders.
- Professional export packaging: anti-rust oil, moisture-proof film, wooden crates/pallets.
Technical & After-sales Support
- Engineering and tech team for selection, standard checking and material recommendation.
- Drawing review, 2D/3D drawings and BOQ lists.
- Professional foreign trade team with multi-language communication.
- Full order follow-up and logistics tracking throughout the process.
News & knowledge
Flange standards, sealing faces & processes
Get in touch
Request a quotation
Send your drawings, standards and quantities — our engineering team will recommend the right flange and reply with a quote.