SRJ Pipe Coupling

Weldless pipe connector

SRJ Weld-free Pipe Coupling solves many of the problems commonly associated with welded and flanged joints in pipelines and process piping. It is weld-free, lightweight, quick to install, and provides a high integrity connection. It can be used as a temporary or permanent solution in both new lay and established pipework.


Requires no welding, no PWHT, no NDT
No bolts - minimal maintenance | No welding
Weighs less than conventional flanges
Available in multiple configurations (pipe to pipe, pipe to flange, bling end, reducer, etc.)
Easy to remove and reinstall (up to 90% faster as compared to flanged connection)
Prevents ingress of external impurities
Not suitable for systems with pressure pulsation


Application SRJ Coupling enables time efficient spool or modular tie in, and rapid equipment change-out (e.g., PSV). Suitable for both Brownfield and Greenfield applications.
Areas of Application Oil & Gas | Desalination | Mining | Utilities | Shipping | Power Generation
Certifications / licences Designed in accordance with ASME B31.3 | Fire rated product approved by ABS and Lloyd's Register for hydrocarbon applications
Dimension Less than a third of the weight of the equivalent flanges.
Installation Does not introduce added stress to the pipe (unlike ball-grip mechanical coupling).
Material Coupling is made of 4130 Carbon Steel as standard.
Pipe diameter ABS and LR approved for 1.25" to 16" nominal pipe sizes.
Pressure class Internal seals retain the internal pressure of the pipe | Energised once the pipe is under pressure | Suitable for a range of pipe media | Replaceable | Available with localised reverse pressure testing functionality
Product Multiple configurations to address different piping system needs (pipe to pipe, pipe to flange, blind end, reducer, etc).
Protection Prevents ingress of external impurities | Protects retaining wires by blocking access to the internal bore of the coupling
Relative business impact
CO2 footprint reduction:
Cost reduction:
Safety improvement:
Technology Maturity Level
Development Technology demonstration Mature / Proven

About SRJ Technologies

SRJ delivers weld-free pipe repair and replacement solutions, bespoke EPRS tools and specialised engineering services, helping asset owners and operators improve safety, increase operational efficiency, and enable proactive and cost-effective approach to Asset Integrity Management.

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