End Caps for Large-Diameter Pipes (Custom R&D)
Heavy-duty, custom-manufactured end caps for hydrostatic pressure testing of large-diameter plastic pipes from 800 mm to 4000 mm. Features a press-free, hammer-free assembly with a custom threaded press mechanism and adaptive silicone/rubber seal technology. Accommodates pipe deformation during testing and requires no special tools.
End caps for 800–4,000 mm pipe
Large-diameter pipe cannot be sealed with standard caps: forces are huge, and the pipe ovalises and deforms under pressure. Alarge's R&D department designs and manufactures heavy-duty caps for 800 to 4,000 mm pipe with a custom threaded press mechanism and adaptive silicone/rubber seals that follow pipe deformation during the test. Assembly needs no press and no hammer, and caps are built in galvanised structural steel or AISI 304/316L stainless steel.
- Diameter range: 800–4000 mm
- Compatible with PE, PP, PE-RT, PEX pipes
- Press-free & hammer-free assembly design
- Custom threaded press mechanism
- Adaptive silicone/rubber seal technology
- Material: galvanised structural steel or AISI 304/316L stainless steel
- Tolerates pipe deformation during hydrostatic testing
- 1-year warranty
Standards
- ISO 1167 — Thermoplastic pipes — resistance to internal pressure
- ASTM D1598 — Time-to-failure under constant internal pressure
- ASTM D1599 — Short-time hydraulic failure pressure
Frequently Asked Questions
Which diameters are covered?
800 mm to 4,000 mm, designed for each project's pipe dimensions.
How are the caps fitted?
With a custom threaded press mechanism — no hydraulic press, hammer or special tools are needed.
What happens if the pipe deforms during the test?
The adaptive silicone/rubber seal follows the deformation, so the cap keeps sealing as the pipe wall moves under pressure.
Which materials are available?
Galvanised structural steel or AISI 304/316L stainless steel, for PE, PP, PE-RT and PEX pipes.