Stainless steel High-Pressure Weld Hexagon Nut Union

JN-UN-23 3001

Size：DN6–DN100 (1/8"–4")
Grade：SS304, SS316L
Standard：DIN, ISO, BSP, NPT
Working pressure: 1.6–6.4 MPa
Test pressure: 1.5 × working pressure
Temperature Range：-20℃ ~ +180℃
PTFE seals: Corrosion-resistant, non-stick, good sealing performance, suitable for general hygienic and industrial applications
Viton seals: High-temperature resistant, anti-aging, oil-resistant, suitable for harsh working conditions

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Stainless steel High-Pressure Weld Hexagon Nut Union

Hexagon Nut Union is athreaded pipe fitting with a hexagon nut locking structure for quick connection and disassembly. It is Hexagon Union Hexagon Union Weld UnionWeld Union mainly installed at pipeline jointsthat need frequent assembly or maintenance, used to connect two pipe sections securely while ensuring reliable sealing. Widely used in industrial, hydraulic, and hygienic pipelines. Types include straight hexagon nut union,reducing union, andextended union to meet different connection length and diameter requirements.

Hexagon Nut Union features a precision hexagon nut locking structure for stronger torque and tighter sealing than ordinary unions, enabling stable connection without easy loosening. It offers easier installation and higher pressure resistance. Our products adoptforged SS304/SS316L,CNC precision machining, and perfect surface finish. Compared with others, we providehigher dimensional accuracy, better sealing, longer service life, and more stable performance, effectively reducing leakage risks and maintenance costs.

Accessories

Component & Material Table

Union body: SS304, SS316L
Hexagon nut: SS304, SS316L
Seal gasket: PTFE, Viton (FKM), EPDM

Product Parameter Details

Material: SS304, SS316L
Structure:Straight threaded union, hexagon nut locking, equal / reducing type
Pressure: Working pressure 1.6–6.4 MPa; Test pressure 1.5 × working pressure
Temperature Range: -20℃ ~ +180℃
Function:Pipeline connection, disassembly, sealing and maintenance
Grade: Hygienic grade, industrial grade, chemical grade
Standard: DIN, ISO, NPT, BSP
Hygiene & Safety Level: Sanitary level, food‑grade safe
Installation: Suitable for horizontal and vertical installation
Customization:Custom size, thread type, material, length; sample service available

Stainless steel High-Pressure Weld Hexagon Nut Union

Feature (F)、Advantage (A)、Benefit (B)

1.Raw Material

F: Forged SS304 / SS316L stainless steel
A: High strength, corrosion resistance, non-toxic, durable
B: Safe for hygienic & industrial systems, long service life

2.Processing Technology

F: Full CNC precision machining, smooth surface, high dimensional accuracy
A: Stable fitting, tight assembly, no burrs, consistent quality
B: Easy installation, reduces assembly failure, improves reliability

3.Structure Feature

F: Hexagon nut locking design, straight/reducing union structure
A: Strong connection, easy tightening, stable sealing, not easy to loose
B: Faster installation, lower leakage risk, less maintenance

4.Seal Feature

F: High-quality PTFE / Viton / EPDM gaskets, face-sealing structure
A: Excellent sealing, high & low temperature resistance, no leakage
B: Ensures pipeline safety, reduces medium loss and downtime

5.Standard & Compatibility

F: Complies with DIN, ISO, NPT, BSP standards
A: Wide compatibility, interchangeable with global pipelines
B: Easy replacement, suitable for many industries, lower project cost

Stainless steel High-Pressure Weld Hexagon Nut Union

Interface Mode: Threaded connection (NPT / BSP / DIN / ISO)

Production & Processing Method: CNC precision machining, integrated forming

Surface Treatment: Mechanical polishing, electrolytic polishing, passivation

Raw Material Processing Method: Forging (SS304 / SS316L)

Operation Mode: Manual assembly & disassembly

Seal Material Options: PTFE, Viton (FKM), EPDM

Sealing Method: End-face static sealing, center sealing

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