Technical Operate
Technical Operate
  • Commissioning Services
  • Procurement Services
  • Construction 
  • Manpower 
  • Equipment 

Pressure Testing

Pressure testing should be conducted after installing the piping system and vessels according to specification. UNION is capable to organize & mobilize the proper equipment with experienced personnel according to various specification even high pressure or other special requirements.

  • Hydrostatic Pressure Test
  • Pneumatic Pressure Test
  • Hydraulic Pressure test


Flushing of piping is carried out in order to remove mud, sand, cement, welding slag, loose foreign materials, sludge & iron pieces and such in the pipes, generated during manufacturing, fabrication, transportation, erection and construction process. In addition, flushing increases lifetime of equipment significantly and decreases the likelihood of decommissioning due to contamination. Our Flushing method is purposed to minimize possibility of recontamination during all processes before commissioning of equipment

  • Water Flushing
  • Hot Oil Flushing
  • Hydro Jetting
  • Air Blowing & Shocking

Chemical Cleaning

Purpose of chemical cleaning is to remove rust, corrosion, mercury, grease and more and to prevent corrosion by passivation to nonferrous metal. Chemical cleaning can be applied to various area such as piping system, surface of material or equipment, raw material, coated surface etc.

  • Pickling
  • Passivation

Machinery & Piping, HVAC System Functional & Safety Test

UNION is capable of mobilizing and conducting commissioning services for equipment or the entire system of different type of vessels and platforms for offshore & onshore projects. We are confident that our expertise will give satisfactory result to our clients.

  • Crane
  • HPU
  • Mooring System
  • Rotating Equipment
  • Instrumentation
  • Cooling System
  • Fire Fighting System
  • Ballast & Cargo system
  • HVAC System
  • Others

Hydraulic Actuated Remote Valve Operating Test

We can operate Hydraulic actuated valves with temporary portable HPU system. This service can be applied during flushing or other situations where permanent HPU system is not operational.

Nitrogen Services

UNION has extensive experience in N2He leak testing on oil & gas installations. UNION typically includes the following in the scope of work (SoW) for such operations:

  • All necessary engineering and planning, including production of procedures and work packs
  • All necessary equipment and consumables
  • All necessary personnel, including Supervisors
  • All test activities
  • All required documentation

Leak testing is normally performed in the following settings:

  • During the commissioning phase of new builds
  • After maintenance or modification work on existing installations


Purchasing services in shipbuilding & offshore fabrication projects during construction, commissioning & operation stage. UNION will be providing the best project purchasing solution from mobilization to sail-away.

  • Checking client’s requirement based on Class rule
  • Sourcing multiple options
  • Competitive costs
  • High quality material providing
  • Material selection Consultant for Client cost saving
  • Material delivery & warranty service
  • Fabricated Structure


Logistics services for the handling of project materials, especially for shipbuilding & offshore fabrication projects. Taking care of OFE and CPI from custom clearance, transportation, warehousing & delivery during the construction phase as well as post-delivery.

  • Owners' Furnished Equipment (OFE) Handling
  • Company Provides Item (CPI) Handling
  • International Forwarding Services-
  • Customs Clearance Services
  • Project materials & equipment Handling
  • International Moving of Personal effects
  • Material handling supply vessel
  • Air/Sea Freight


Offering a variety of warehousing services to meet client needs operated by highly trained and certified UNION employees. Providing cost effective and reliable storage, order management and fulfillment services, pick pack services, kitting services

  • Receiving Inspection
  • Punch Clearance
  • Preservation / Maintenance
  • Material Packing, Bagging & Tagging
  • Fumigation


UNION has been carrying out various work for offshore projects in construction phase since 2013. Each discipline was executed with the best personnel with the ability to perform the work and there has not been a single accident. With our experiences in this field and experienced personnel, we can provide any services during construction phase to our customers together with our robust safety system.

Structure (Outfitting)

  • Platform
  • Ladder
  • Support
  • Hatch cover
  • Weatherproof tighten door
  • Monorail
  • Stair
  • Modification work
  • Grating

Mechanical Services

  • PSV Calibration
  • Equipment handling
  • Foundation Dimension Control and Leveling
  • Shaft Alignment
  • Insulation
  • Assembly
  • Installation
  • Mechanical Completion

Electrical & Instrumentation

  • Cable tray & support installation
  • Cable pulling
  • Connection & wiring
  • IR Test

Preservation Service

  • Storage
  • Maintenance
  • Humidity control
  • Clean & Dry Building

PSV Calibration

UNION carries out PSV calibration, adjustment, repairing service with specialized digital test equipment.

  • Allowable Test Pressure: -1 ~ 700 barg
  • Allowable Test Size: ½” ~ 12”
  • UNION have special container to perform PSV calibration work including required safety equipment such as lifting davit.

Additionally, UNION can provide total services from dismantlement of the piping system, transportation, packing to reinstatement according to FMS procedure with the proper equipment.

We are sure our clients will be satisfied with our efficient procedure.

With our extensive experiences from various projects, we are confident in delivering satisfactory service until completion.

Equipment Installation

UNION can install different equipment and components from small and delicate to big and heavy. Our personnel have been involved in many practical installations at the shipyard including onshore & offshore projects.

  • Diving Equipment
  • Mooring Winches
  • Rotating Equipment
  • Equipment Package Skid
  • Shaft Alignment
  • Equipment handling

Structure Manufacture & Installation

UNION carried out manufacture, modification, rigging, installation for various of structure items such as platform, ladder, stair, grating, monorail etc.

Sea Fastening Work

UNION carried out sea fastening work for stable sail away, UNION can provide engineering solution and installation service for all kind of sea fastening work.

Fumigation Service

UNION carried out fumigation service for storage area before sail away. Fumigation should be conducted mandatorily for oversea movement, and we can provide applicable solution and service for each destination.


UNION offers wide range of manpower support services including permanent placement, contractual workforce for short-term and project-based recruitment in new-shipbuilding as well as in oil & gas development fields.
Our service as a strategic partner to our clients, we align the unique needs of our clients with the talents required for successful completion of projects. We are also able to provide you with competitive local manpower at all locations whether it be administration personnel or site inspectors.
UNION ensure that efficient, professional and flexible service provision is essential to successful deployment. Our team working closely with our clients and candidates, we can ensure that workload fluctuations are managed successfully.

Manpower Service

At UNION, we can offer and acquire manpower required for each client’s individual needs from experienced back-office team to provide smooth payroll to skilled technicians proficient in their craft. UNION’s candidates and workers are extremely important to UNION and therefore we only discuss validated opportunities.

  • Recruiting services (Expat, Local person)

    + Project Planner & Engineer,

    + Inspector

    + Technician (Construction / Commissioning / Etc)

    + Office staff (Secretary, Admin, Document control, Driver / IT/ Etc)

  • Temporary recruitment
  • Payroll services

UNION ensures your equipment or module has been completed to the required quality as per all contractual specifications and is fully operational.

  • Factory Acceptance Test (FAT)
  • Receiving Inspection (RI)
  • Site Acceptance Test (SAT)
  • Preservation & Storage management

Chemical Cleaning Unit

Chemical Cleaning Unit
Pump Model No.HTM 125/3(multi stage-3)
Pump Capacity3300L/min
Max working pressure14bar/7bar
Motor Capacity1760RPM, 440v, 4P, 160kw, 220HP
Housingbag filter peir05(1um-90%) Mounted on the pump
Heater150A * 40kw * 4EA
Reserve Tank4ton

Oil Flushing Unit

Oil Flushing Unit
Pump Model No.PV-GS1300-46-F115B(Scerw-3)
Pump Capacity2860L/min
Head of Pump420m
Max working pressure40bar/12bar
Motor Capacity1770RPM, 440v, 4P, 176kw, 250HP
Housingbag filter peir05(1um-90%)
ElementPall(USA) type ue619az40z(3um 99.9%)
Heater150A x 40kw x 4EA
Reserve Tank3.5 ton
Size2500 x 4500 x 3500

PSV Test Bench

PSV Test Bench
Test Range: 0 ~ 700 Bar
Components Air Driven gas booster & Liquid pump
Pressure regulating valve
Gas receiver
Gas Booster AGT-32/62
Stop valve & Drain valve
Analog gauge & Digital gauge 750 bar
Stainless steel tube & fitting
Relief valve
Test PressureMax N2 Gas Pressure: 700Bar
Max Water Pressure: 420Bar
Clamp jig Clamping capacity: 40 tontd
3-jaw, Piston loaded Auto Clamping unit for Quick & effortless clamping of valves.
Flange type up to 12”, Thread type up to 1 1/2”
Safety Safety Valves to protect against system over pressure
Safety Screen to protect the operator from exposure to pressurized test media

Certified by ABS. Certificate no. 4042839-3

Calibration Equipment

Fluke 724 Temperature Calibrator

Fluke 724 Temperature Calibrator

Ramp functions Source functions Voltage, current, resistance, frequency, temperature
Ramps Slow ramp, Fast ramp, 25% step-ramp
Loop power function Voltage 24 V
Accuracy 10%
Maximum current 22 mA, short circuit protected
Step functions Source functions Voltage, current, resistance, frequency, temperature
Source functions 22 mA, short circuit protected
Environmental Specifications
Operating temperature -10°C to 55°C
Storage temperature -20°C to 71°C
Humidity (without condensation) 90% 10°C to 30°C
75% 30°C to 40°C
45% 40°C to 50°C
35% 50°C to 55°C
Fluke 715 Volt/mA Loop Calibrator

Fluke 715 Volt/mA Loop Calibrator

Functional Specifications
Measure / Source mV Range 0 to 200 mV
Resolution 0.01 mV
Accuracy 0.015% + 2 counts
Measure / Source V Range 0 to 20 V
Resolution 0.001 V
Accuracy 0.01% + 2 counts
Measure / Source/ Simulate mA (% of span) Range0 to 24 mA (-25% to 125%)
Resolution0.001 mA
Accuracy 0.01% + 2 counts
Sink (simulate transmitter) display mA or % of span
Loop power Range 24 V DC
Accuracy ±10%
Drive; 20 mA into 1000 Ω for battery > 6.8 V; 700 Ω for battery 5.8 to 6.8 V
Fluke 719Pro 300G /Electric Pressure Calibrator

Fluke 719Pro 300G
Electric Pressure Calibrator

Range-12 to 300 psi / -0.8 to 20 bar
Resolution0.01 psi / 0.001 bar
Accuracy±0.025% of full scale, 6 months
±0.035% of full scale, 1 year
Temperature effectranges) Add ±0.002% F.S./°C for temps outside of 15°C to 35°C
- Range Resolution Accuracy (1 year)
mA DC (simulation and measurement) 0-24 mA DC 0.001 mA ±0.015% of reading ±2 counts
1000ohm maximum load in mA source, 26 V DC maximum voltage in mA simulate
Volts DC (measurement only) 30 V DC 0.001 V ±0.015% of reading ±2 counts
No AC voltage measurement, do not exceed 30 V DC
Temperature (measurement only, Pt100 RTD) -50 to 150°C (-50°F to 302°F) 0.01°C 0.01°F Temperature ±0.1°C (0.2°F)
±0.25°C (±0.45°F) combined uncertainty when using 720 RTD probe (optional accessory)
Loop power supply 24 V DC N/A 24 mA at 24 V
Temperature effect (all functions) - - Add ±0.002% F.S./°C for temps outside of 15°C to 35°C
No effect on accuracy on all functions from 15°C to 35°C
GE DPI 611 Hand-held Pressure Calibrator

GE DPI 611 Hand-held Pressure Calibrator

Pressure (gauge ranges referenced to atmosphere)
Pressure Range - Accuracy Total uncertainty2 10° to 30°C (50° to 86°F) for one year Overpressure
bar psi %FS %FS %FS
-1 to 1-14.5 to 150.01850.025150
-1 to 2-14.5 to 300.01850.025150
-1 to 7-14.5 to 1000.01850.025150
-1 to 10-14.5 to 1500.01850.025150
-1 to 20-14.5 to 3000.01850.025150
Electrical measurement and source
Measure / Source V Range 0 to 20 V Resolution
%Rdg + %FS %FS/°C
Measure mode
DC Voltage
+/- 200 mV 0.018 0.005 0.001 0.001
+/- 2000mV 0.018 0.005 0.001 0.01
+/- 20 V 0.018 0.005 0.001 0.00001
+/- 30 V 0.018 0.005 0.001 0.0001
+/- 20 mA 0.015 0.006 0.001 0.0001
+/- 55 mA 0.018 0.006 0.001 0.0001
Meriam MFC5150 HART® Communicator

Meriam MFC5150 HART® Communicator

Environmental Conditions
Operating Ambient temp 14 °F to 122 °F (-10 °C to 50 °C)
Ambient humidity 0% to 95% RH (non-condensing) for 32 °F to 122 °F (0 °C to 50 °C)
Storage Ambient temp. with battery -4 °F to 131 °F (-20 °C to 55 °C)
Ambient temp. without battery -4 °F to 150 °F (-20 °C to 60 °C)
Ambient humidity with battery 0% to 95% RH (non-condensing) for 32 °F to 122 °F (0 °C to 50 °C)
Ambient humidity without battery 0% to 95% RH (non-condensing) for 32 °F to 122 °F (0 °C to 50 °C)
Ambient temp. 50 °F to 104 °F (10 °C to 40 °C)
Ambient humidity 0% to 95% RH (non-condensing)
Other Charge only in Non-Hazardous areas
Intrinsic Safety ANSI/ISA (US) UL913 Ed7 CL I, DIV 1, GP A,B,C,D; T4
UL60079-0 Ed5 CL I, ZONE 0, AEx ia IIC T4
UL60079-11 Ed5 CL I, DIV 1, GP A,B,C,D; T4
ATEX (Europe) EN60070-0:2012 II 1 G Ex ia IIC T4 Ga
IECEx (International) IEC60079-0:2011 Ed6 Ex ia IIC T4 Ga
IEC60079-11:2011 Ed6
IEC60079-11:2011 Ed6
NOVA Digital Pressure Gauge NPG-2

NOVA Digital Pressure Gauge NPG-2

Pressure Range
Compound Pressure Gauge Pressure High Pressure
-1 bar ~ -1 bar 0 bar ~ 70 bar 0 bar ~ 1,500 bar
-1 bar ~ 3.5 bar 0 bar ~ 350 bar 0 bar ~ 5,000 bar
-1 bar ~ -7 bar 0 bar ~ 700 bar -
-1 bar ~ 10 bar - -
-1 bar ~ 20 bar - -
-1 bar ~ 35 bar - -
Range -1 ~ 5,000 bar
Accuracy ±0.1%F. S or ±0.5% F. S (5,000 bar Only
Unit of pressure kPa, MPa, kgf/cm2, psi, mbar, bar, inHg, inH20, mmH20, mmHg
Operation Temp. -20 ~ 70°C

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