How to Check Natural Gas Pipe Joints and Valves for Leaks with TASI TA702A & TA702B Malaysia
How to Check Natural Gas Pipe Joints and Valves for Leaks with TASI TA702A & TA702B Malaysia
Natural gas leakage can occur around pipe joints, valves, regulators, fittings and equipment connections.
For maintenance technicians, knowing that gas may be present is only the beginning. The next challenge is identifying where the suspected leak is coming from.
The TASI TA702A and TA702B Combustible Gas Detectors are portable instruments that can assist with combustible gas leak detection and leak locating.
Because methane is a major component of natural gas, the TA702 Series can be used for applicable methane and natural gas leak inspection within its intended specifications.
Where Should You Check for a Natural Gas Leak?
When inspecting a gas installation, technicians should follow the applicable site procedures and pay attention to relevant connection points such as:
Threaded pipe joints
Valves
Regulators
Flanges
Fittings
Flexible connections
Equipment connections
Recently repaired sections
Recently modified piping
Instead of moving the detector randomly around the area, a systematic inspection makes troubleshooting easier.
For example:
Gas Supply → Regulator → Main Pipe → Joint → Valve → Equipment Connection
Why Pipe Joints Require Attention
A long section of intact piping may not be the first place a maintenance technician investigates when leakage is suspected.
Connections are particularly important because they involve interfaces between components.
A maintenance inspection may therefore focus on:
Joint → Fitting → Valve → Regulator → Connection
If the detector response increases around one particular point, that location can be investigated further according to the appropriate procedure.
Checking Valves for Suspected Leakage
Valves contain multiple areas that may require inspection depending on their design.
Rather than simply placing the detector somewhere near the valve, move the sensing probe carefully around the relevant connection areas.
Compare the detector response as the probe moves around the valve and nearby piping.
The objective is to determine whether the response becomes stronger near a specific location.
TASI TA702A for Natural Gas Leak Locating
The TASI TA702A is particularly suited to straightforward leak-locating work.
It provides:
High / Medium / Low sensitivity adjustment
This allows the operator to change sensitivity while narrowing down the suspected source.
A practical troubleshooting sequence is:
High Sensitivity → Screen the Area
Identify where the detector begins responding.
Medium Sensitivity → Narrow the Search
Move closer to individual joints, valves and fittings.
Lower Sensitivity → Investigate the Suspected Point
Where appropriate, reduce sensitivity as the suspected area becomes smaller.
This approach can help distinguish between a general gas presence and a more localized suspected leak point.
When Is TASI TA702B Useful?
The TA702B provides additional information during inspection.
It supports ppm / LEL indication, together with ambient temperature and concentration trend information.
This can be useful when a technician wants to compare responses between several locations.
For example:
Pipe Joint A
↓
Valve B
↓
Regulator C
↓
Equipment Connection D
If the indicated response rises when approaching one location, that area can be investigated more closely.
Why Use the Flexible Probe?
Natural gas piping is not always installed in an easily accessible location.
Potential inspection points may be:
Behind machinery
Above equipment
Between pipes
Near walls
Inside equipment spaces
Around crowded valve assemblies
The TA702 Series uses a flexible probe, allowing the operator to position the sensing area closer to difficult-to-reach connections.
Built-in LED illumination can also assist when inspecting poorly illuminated areas.
Factory Natural Gas Inspection
Factories may use combustible gas for processes such as heating or other production applications.
Where natural gas systems are present, relevant maintenance inspections may include:
Gas Pipe → Regulator → Valve → Burner / Equipment → Connection
A portable leak detector can be useful when technicians are troubleshooting a suspected leakage point.
This can complement other preventive maintenance activities such as vibration, temperature, electrical and equipment condition checks.
Building and Facility Maintenance
Natural gas leak inspection can also be relevant to facility management teams responsible for applicable gas installations.
Potential users include:
Facility management companies
Building maintenance departments
Hotel engineering teams
Industrial maintenance contractors
Factory engineering departments
Commercial property maintenance teams
The appropriate detector should always be selected according to the gas, application and required safety procedure.
Can TA702A and TA702B Measure Methane?
The TA702 Series responds to methane and is intended for combustible gas detection.
However, it is important to distinguish leak detection from specialized gas analysis.
If your requirement is:
“I need to locate a suspected methane leak.”
the TA702 Series may be suitable for the intended application.
If your requirement is:
“I need highly specific methane concentration measurements for process, laboratory or regulatory purposes.”
you may require a different class of instrument.
The measurement objective should be defined before selecting the detector.
Natural Gas Leak Detector vs Multi-Gas Safety Monitor
Do not assume these instruments perform the same job.
The TASI TA702 Series is intended primarily for combustible gas leak detection and leak locating.
Applications involving personal atmospheric safety or confined-space work may require appropriately specified instruments capable of monitoring hazards such as:
O₂ / CO / H₂S / Combustible Gas
together with applicable safety procedures.
Which Model Should a Maintenance Technician Choose?
TASI TA702A
Consider TA702A when the main requirement is:
Finding the suspected natural gas leak source.
Its three sensitivity levels are useful for narrowing down the inspection area.
TASI TA702B
Consider TA702B when you also want:
ppm / LEL indication and additional concentration information during inspection.
The correct choice depends on what information is actually required during maintenance.
Looking for a Natural Gas Leak Detector in Malaysia?
MTM Precision supplies portable instruments for industrial maintenance, factory troubleshooting, facility management and gas leak inspection.
Before selecting a detector, tell us:
What gas are you checking?
Where is the gas system located?
Are you checking pipes, valves, regulators or machinery?
Do you need leak locating or atmospheric safety monitoring?
This information helps us recommend the appropriate type of gas detector for the application.
MTM Precision Sdn Bhd
Showroom & Service Centre
No 29-1 & 2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor.
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
Serving customers throughout Malaysia including Selangor, Kuala Lumpur, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kelantan, Terengganu, Kedah, Perlis, Sabah and Sarawak.
27 Sep 2026
