Flange Weld & Valve Testing Services in KSA
Testing a single tie-in weld should not mean filling a whole system with water. Our isolation tools pressure test just the weld, and our valve tests prove valves before they go back into the line.
Proving welds and valves without a full system test
When a new spool is welded into an existing system, a full hydrotest of the system may be impossible or far too slow. A flange weld test or in-line weld test solves this: an isolation tool is placed inside the pipe across the new weld, sealing a small annular space that is pressurized on its own. Only the weld sees test pressure, and only a few litres of water are needed.
Valves returning from overhaul, or new valves before installation, also need proof that the body holds pressure and the seat seals. Our valve testing covers shell and seat tests with calibrated equipment, recorded against the valve tag.
These tests sit naturally next to our hydrotest services and pre-commissioning work, using the same pumps, instruments and crews.
How weld and valve tests are done
The test pressure and hold time come from your test procedure or the governing code.
Flange weld testing
A tool seals against the flange face and inside the pipe, isolating the flange-to-pipe weld for a local pressure test.
In-line weld testing
A double-seal tool is positioned inside the pipe across a butt weld, pressurizing only the weld zone.
Valve shell test
The valve body is pressurized with the valve part open to prove the body and bonnet hold pressure.
Valve seat test
Pressure is applied to one side of the closed valve and leakage past the seat is checked.
Calibrated recording
Pressure is held and logged on calibrated gauges or recorders for the required time.
Isolation for hot work
Isolation tools can also seal a line upstream of a tie-in weld, where your procedures allow.
Our weld and valve testing process
Each test is run to an agreed procedure and recorded.
Confirm the test
Weld or valve details, test pressure and hold time are confirmed from your procedure.
Select the tool
Isolation tool or test fixture is chosen for the pipe size and schedule.
Position and seal
The tool is placed across the weld, or the valve mounted, and seals checked.
Pressurize
Pressure is raised in stages to the test value.
Hold and inspect
Pressure is held and the weld or valve inspected while it is recorded.
Release and record
Pressure is released, the tool removed and the result recorded.
Where weld and valve testing is used
Situations where a full system test is not practical.
Tie-ins to live systems
Testing new welds where the existing system cannot be filled.
Repair welds
Proving repair welds on spools during shutdowns.
Pre-commissioning
Closing test packs with local weld tests where allowed.
Valve overhauls
Testing valves before they are reinstalled.
New valve acceptance
Testing new valves on site before installation.
Fabrication yards
Testing welds and valves on spools and skids before shipment.
Services that go with weld and valve testing
Testing usually follows cutting, welding and bolting on a tie-in.
Hydrotest
Hydrostatic pressure testing of piping, vessels and spools with calibrated pumps, gauges and recorders.
View hydrotestPre-Commissioning
Test packs, hydrotests, leak tests, drying, purging and reinstatement from one crew.
View pre-commissioningPneumatic & Helium Leak Testing
Pneumatic strength tests and helium tracer-gas leak detection for tight systems.
View pneumatic & helium leak testingPipe Cold Cutting
Spark-free clamshell and split-frame cutting and bevelling for live plants where hot work is not allowed.
View pipe cold cuttingFlange Facing
On-site machining that restores flange sealing faces to the right finish and flatness, without removing the pipe.
View flange facingBolt Torquing
Hydraulic torque wrenches and stud tensioners applying a calculated bolt load, pass by pass, with a tagged record for each joint.
View bolt torquingWeld and valve testing across Saudi Arabia
Our crews and equipment travel to plants and project sites in every region of the Kingdom.
Flange weld and valve testing in KSA: common questions
What is flange weld testing?
It is a local pressure test of the weld between a flange and its pipe, using a tool that isolates the weld so only that small area is pressurized.
Can a weld test replace a full hydrotest?
That depends on your code, specification and client. Local weld tests are widely used for tie-ins and repairs where full system tests are impractical, but the decision rests with your engineering and inspection team.
What pipe sizes can you weld test?
Isolation tools are sized to the pipe bore and schedule. Send the line size and schedule and we will confirm a suitable tool.
Do you test valves on site?
Yes. We can carry out shell and seat tests on valves at your site or workshop, with recorded results.
Have welds or valves to test?
Send the pipe sizes, test pressures and quantities. We will reply with tools, crew and a price.
- Phone+966 50 605 8927
- Emailalviqaisar@gmail.com
- BaseEastern Province, Kingdom of Saudi Arabia
- HoursOffice Sunday to Thursday, 7 AM to 5 PM. Field call-outs any day, any hour.