DN100 EPDM Thread with Any Rubber Expansion Joint

Core Structural Components

1. Union Body
   It is the main connecting section, usually with internal threads or butt-weld ends, used to connect the two target pipes. The body's inner cavity is smooth to ensure unobstructed medium flow and reduce pressure loss.
2. Union Nut
   It acts as the locking component. By tightening the nut, it compresses the sealing element to achieve reliable sealing between the union body and the connecting end.
3. Sealing Gasket
   It is the core part to prevent medium leakage. The material of the gasket is selected according to the pipeline's working conditions, such as medium type, temperature, and pressure. Common materials include rubber (NBR, EPDM), PTFE, metal (copper, stainless steel), etc.

Key Technical Features

1. High Versatility
   • Compatible with various pipe types, including steel pipes, stainless steel pipes, copper pipes, and plastic pipes.
   • Available in multiple connection modes: threaded (BSP, NPT, ISO), welded (butt weld, socket weld), and flanged, to meet different installation requirements.
2. Strong Adaptability to Working Conditions
   • Pressure Rating: Covers low-pressure (PN10/16) to high-pressure (PN100+) ranges, suitable for general industrial pipelines and high-pressure hydraulic systems.
   • Temperature Resistance: Depends on the material. Metal unions can withstand temperatures from -196ºC (cryogenic) to 800ºC (high-temperature), while non-metal sealed unions are suitable for -50ºC to 200ºC.
   • Corrosion Resistance: Material options include carbon steel (WCB), stainless steel (SS304, SS316L), alloy steel, and Hastelloy, adapting to corrosive media such as acids, alkalis, salts, and organic solvents.
3. Excellent Sealing Performance
   The combination of precision machining surfaces and matching sealing gaskets ensures zero leakage under rated conditions, meeting the strict requirements of industries such as petroleum, chemical, and food processing.
4. Easy Installation & Maintenance
   Compared with permanent connections like welding, pipe unions allow quick disassembly with simple tools, greatly reducing downtime during pipeline maintenance and component replacement.

Common Material Options

Typical Applications

• Oil & Gas Industry: Onshore and offshore pipeline systems, oil refining equipment.
• Chemical Industry: Transfer pipelines for acids, alkalis, and chemical reagents.
• Water Treatment & HVAC: Urban water supply and drainage, heating and cooling pipeline systems.
• Food & Pharmaceutical Industry: Sanitary-grade unions for beverage, dairy, and pharmaceutical production lines (meeting 3A, FDA standards).
• Power Generation: Thermal power plant steam pipelines, nuclear power plant auxiliary systems.

Compliance with Industry Standards

• ISO 8434 (Hydraulic fluid power)
• ASME B16.11 (Forged fittings, socket-welding and threaded)
• DIN 2999 (Threaded pipe unions)
• GB/T 14383 (Chinese national standard for pipe unions)
  Product Parameters

  DN Nominal Diameter (mm)		LengthLmm		Axial displacement mm		Haorizontal isplacement mm	Angular deflection(a1+a2)°
  mm	inch	A	B	Extension	Compression
  15	1/2"	180	200	6	22	22	45
  20	3/4"	200	200	6	22	22	45
  25	1"	210	200	6	22	22	45
  32	1-1/4"	210	200	6	22	22	45
  40	1-1/2"	220	200	6	22	22	45
  50	2"	220	220	6	22	22	45
  65	2-1/2"	240	240	6	22	22	45
  80	3"	285	285	6	22	22	45