After Sales Services
Spectrum of Tehnical Services
- Our experts are trained specially and familiar with all functional part of Natural Gas Pressure Regulating and metering skid equipments in Gas IPRS / MRS / DPRS etc.
- We undertake Maintenance contracts, which relieve our customers and guarantee that the maintenance work will be carried away during predefined time period irrespective of the problem noticed or where ever the problem reported.
- We stock all necessary emergency spares to support our esteemed customers.
- Our service dept is able to carry out maintenance works and repairs as well as conversions on site. Completed work can be tested fully functionally as per IGE requirements.
- We have our service vehicles, fully equipped with all necessary tools and equipments to normalize the equipments in shortest time, cost effectively.
- We have our test set up in the workshop to carry out the pressure and flow test for regulators, safety valves and slam shut valves.
- We do carry out the calibration of the custody transfer meter / flow computers at site / or at our workshop. This includes the PT/DPT/TT routine calibration for orifice type metering
Persons required to carry out maintenance work
- Skilled person: A fully trained person, knowing the functionality of the Natural gas Pressure Regulating and metering modules, Bechlor of engineering and diploma engineers fully trained on Nirmal’s equipments.
- Semi Skilled Persons: A fully trained on repairs jobs on Valves and knowing the safety rules work under skilled persons
Various tasks to be carried out on Gas Stations
- Visual Checking
- Inspection
- Functional tests
- Servicing and Repairs
- Re commissioning
- Operation of Bypass and stanby lines
To carry out above functions skilled and semiskilled persons are required.
Pressure Vessel
| Component | Functional Test | Maintenance |
|---|---|---|
| Filter / KOD | • External leakage test • Check of control instrumentations like DPG/DPT/LS/LT | • Cleaning or replacement of filter elements • Cleaning of pressure vessel / replacement of damaged parts • Internal test and strength tests |
| Heat Exchanger | • External leakage test | • Cleaning of pressure vessel / replacement of damaged parts • Internal test and strength tests |
Safety Devices
| Component | Functional Test | Maintenance |
|---|---|---|
| Slam Shut Off Valve (SSV) | External leakages at operating pressure | Dismantling of the valves and check all the components |
| Checking of set point for UPSO and OPSO pilots | Cleaning of the valve body and parts | |
| Check of leak tightness of the seat | Replacement of the necessary spares | |
| Full functional test | Full functional test and resetting of the requested set points | |
| Creep Relief Valves (CRV) | External leakages at operating pressure | Dismantling of the valves and check all the components |
| Check of leak tightness of the seat | Cleaning of the valve body and parts | |
| Full functional test | Replacement of the necessary spares and resetting of the requested set points |
Pressure Regulators (Active and Monitors)
| Functional Test | Maintenance |
|---|---|
| External leakages at operating pressure | Dismantling of the valves and check all the components |
| Checking of Set point for Active and monitors for active and standby streams. | Cleaning of the valve body and parts |
| Check of leak tightness of the seat | Replacement of the necessary spares |
| Full functional test | Full functional test and resetting of the requested set points |
Isolation Valves
| Component | Functional Test | Maintenance |
|---|---|---|
| Ball Valves | Check Position and free movement | According to Manufacturer standards |
| Check of internal and external leak tightness | ||
| Gate Valves | Check Position and free movement | According to Manufacturer standards |
| Check of internal and external leak tightness |
Pressure Gauges / Pressure Transmitters/ Diff Pressure transmitters
| Functional Test | Maintenance |
|---|---|
| Check of calibration | Calibration according to manufacturer recommendations. |
| Check zero and working /limit values |
Custody Transfer meters
| Functional Test | Maintenance |
|---|---|
| Calibration help can be provided as per industry standards. | Industry standards |
| Pressure and Temp Calibration. | |
| Check on the parameters as per AGA requirements/ NX-19 |
NRV
| Functional Test | Maintenance |
|---|---|
| Seat Leak tightness check | Mfr standard |
| Checking the soft Disc / metal surface for damages, replace / repair the same. |
Flow Control Valve
| Functional Test | Maintenance |
|---|---|
| Functional check / stroke checks | Calibration of I to P , Positioner and strokes of the valves. |
| Fail condition checks | Leak tightness check |
ESD valve
| Functional Test | Maintenance |
|---|---|
| Shut down can be checked with bypass valve open / by few turns of the valve and resetting the same. | Actuator stroke at designed air pressure |
| Checks of SOV and all accessories | Seat Leak tightness check |
| Replacement of seat / gland etc if required | |
| Sealant injection etc |