RWNA
RWNA Engineering SDN.BHD
On-Site Machining Services - RWNA Engineering Sdn. Bhd.
On-Site Machining

Core Services  /  On-Site Machining

On-Site Machining
Services.

Precision machining solutions delivered directly to your facility.

Hydraulic Torque Wrench (HTW)
01 — Sub-Service

Hydraulic Torque Wrench (HTW)

RWNA owns and operates state-of-the-art hydraulic & pneumatic torque wrenches supported by qualified and experienced manpower. A hydraulic torque wrench is a tool designed to exert torque on a connection through the use of a hydraulic system, applying a pre-determined, controlled amount of torque to a properly lubricated fastener for accurate tightening or loosening. With our highly trained personnel, we are also able to cater for highly customised solutions.

Benefits

  • Cutting-edge, compact and accurate tool for loosening and tightening bolted connections without damaging bolts.
  • Tested and calibrated for high accuracy, reliability and repeatability.
  • With highly competent engineers and technicians as well as a large and comprehensive collection of Hydraulic/Pneumatic Torque Wrenches, we are ready to solve ad-hoc site issues and ensure quick and reliable delivery.

Key Features

  • Rigid steel design ensuring durability, reliability and safety.
  • High versatility: One hydraulic drive unit per torque capacity can be used to drive any hexagon head within the range.
  • Quick and easy set up for efficient operation.
  • Choice of manual, pneumatic or hydraulic-driven motors.
  • Higher accuracy of up to +/- 3% with standard torque chart.

Specifications

  • Various sets of hydraulic torque wrench machines.
  • From link 27mm – 155mm.
  • 352 pump sets, 572 drivers and 924 links.
Hydraulic Bolt Tensioning (HBT)
02 — Sub-Service

Hydraulic Bolt Tensioning (HBT)

RWNA has highly trained technicians and state-of-the-art hydraulic equipment for all bolting needs. We offer an accurate method of tightening threaded fasteners through hydraulic tensioning technology, ensuring accurate bolt loading in a controlled and safe manner that consistently meets the stringent needs of the oil and gas industry.

Benefits

  • Suitable for offshore, onshore topside and sub-sea applications.
  • The applied load is controlled very accurately, being directly proportional to the pressure applied to the tensioner.
  • Improved accuracy reduces tensioning time required to retighten the load.
  • Tensioning allows for loading multiple fasteners in a joint simultaneously.
  • Uniform bolt loading ensures a high level of accuracy by applying a consistent force.
  • Purely axial, tensile loading ensures no torsional stresses are introduced.
  • With highly competent engineers and technicians as well as a large collection of Hydraulic Bolt Tensioning equipment, we are ready to solve ad-hoc site issues and ensure quick and reliable delivery.

Key Features

  • Highly portable, convenient, quick and easy set up.
  • Hydraulic driven.
  • Easily estimate friction co-efficiency.
  • Zero piston area as force is pre-set based on device pressure.
  • Available in metric and imperial units of measurement.

Specifications

  • 66 units of Hydraulic Pump.
  • 1053 sets of Hydraulic Bolt Tensioning.
  • Size Range: ¾" – 4".
Flange Facing (Internal & External Clamp)
03 — Sub-Service

Flange Facing (Internal & External Clamp)

RWNA’s on-site flange facing and milling teams are committed to producing a high quality surface finish on all types of flange face, seal groove, weld preparation and counter boring.

Benefits

  • A more permanent and cheaper alternative to expensive leak-sealing techniques or flange replacement.
  • Helps keep systems running efficiently and safely.
  • Reclaim scrap flanges and flanged valves.
  • Fast and easy set-up.
  • Solid performance — ability to complete most jobs during scheduled downtime, reducing any unnecessary delays.
  • With highly competent engineers and technicians as well as one of the largest and most comprehensive collections of flange facing and milling machines in the SEA region, we are ready to solve ad-hoc site issues and ensure quick and reliable delivery.

Key Features

  • Quick and easy set up for fast machining.
  • Choice of pneumatic or hydraulic driven motor process.
  • Allows on-site repair of large equipment previously made impossible.
  • Suitable for various types of flange (RTJ, Raised Face, Lens Ring, etc.).

Specifications

  • 84 units Internal Clamp.
  • 28 units External Clamp.
  • Ranges from ½" to 150" flange diameter.
  • External/Internal mounted.
Milling
04 — Sub-Service

Milling

RWNA’s on-site milling service provides a precise, cold-work solution for restoring large-scale flange faces and sealing surfaces to exact OEM specifications — without removing equipment from service. Our specialist fleet is engineered for the most demanding conditions in the oil and gas sector, delivering repeatable, workshop-grade results directly at your facility.

Benefits

  • Minimized Downtime: On-site milling eliminates equipment disassembly and transport, restoring assets to service significantly faster.
  • Cost-Effective Restoration: Offers a “repair instead of replace” solution for large-scale flanges, avoiding expensive procurement and heavy-lift logistics.
  • Safe “Cold Work”: Spark-free mechanical cutting removes the need for fire watches or habitats in high-risk oil and gas environments.
  • Precision Sealing: Restores flange faces to OEM flatness and finish specifications, ensuring 100% leak-free joint integrity.

Key Features

  • Large Scale Fleet: 30 specialized units available for rapid deployment and simultaneous multi-point machining during major shutdowns.
  • Wide Diameter Range: Highly adaptable equipment capable of precise milling for flanges from ½" up to 90".
  • Flexible Mounting: Features both internal (ID) and external (OD) mounting systems to accommodate various bore and vessel configurations.
  • Workshop-Grade Accuracy: Achieves high-tolerance surface profiles and RTJ grooves with field-precision of up to +/- 0.002".
  • Powerful Drive Options: Choice of pneumatic or hydraulic motors to efficiently machine hardened alloys including Stainless Steel and Duplex.

Specifications

  • 30 units.
  • Ranges from ½" to 90".
  • External/internal mounted.
Cold Cutting and Bevelling
05 — Sub-Service

Cold Cutting and Bevelling

RWNA caters to your onshore or offshore on-site machining needs for cold cutting and pipe end preparation. This method is conducted in hazardous environments where traditional torch or grinder methods are unsuitable, producing a high quality end result with a higher level of safety assured.

Benefits

  • Fast and easy to set-up.
  • Safe and cost-effective solution.
  • With highly competent engineers and technicians as well as one of the largest and most comprehensive collections of cold-cutting machines in the SEA region, we are ready to solve ad-hoc site issues and ensure quick and reliable performance.

Key Features

  • Mobile, convenient, quick and easy set up — work can be completed within a short period on-site.
  • Short pipe end preparation time for counter boring and splitting.
  • Requires minimum clearance; able to fit in tight working areas and minimize machine height.
  • Split frame design creates easy setup, installation and operation.
  • Choice of pneumatic or hydraulic driven motor.
  • Flexibility to choose from a wide range of bevel types and sizes.
  • Parts and accessories are interchangeable.
  • Able to cut and bevel a large range of pipe sizes, schedules and materials.

Specifications

  • 223 units.
  • Ranges from ½" to 108" pipe OD and vessel diameter.
  • Cutting, bevelling & counter boring application.
Line Boring (Internal & External)
06 — Sub-Service

Line Boring (Internal & External)

RWNA’s on-site line boring service restores bores and housings to exact concentricity, eliminating the need to transport heavy machinery to a workshop. Ideal for pivot points, bearing housings, and large-scale piping, our field-deployable equipment delivers workshop-grade precision directly at your facility — minimizing downtime and extending the operational life of critical assets.

Benefits

  • Precision Structural Alignment: Restores bores and external diameters to exact concentricity, ensuring perfect alignment for shafts, pins, and bearings.
  • On-Site Versatility: Eliminates the need to transport heavy machinery or large-scale piping to a workshop by bringing precision machining directly to the field.
  • Optimized Operational Life: Corrects wear and tear on critical pivot points and housing units, significantly extending the service life of industrial assets.
  • Enhanced Safety & Efficiency: Utilizes spark-free hydraulic and pneumatic drives, suitable for hazardous environments while reducing overall maintenance downtime.

Key Features

  • Exceptional Boring Reach: Capable of deep-bore machining with a travel distance of up to 2000mm for standard units and 300mm for specialized attachments.
  • Dual-Application Flexibility: Equipped with dedicated internal and external attachments to handle diverse pipe and housing configurations.
  • Specific Diameter Range: Precision engineered for piping and bores ranging from 3" to 14" OD.
  • Multi-Power Drive System: Features both hydraulic and pneumatic motor options to adapt to available site power and safety requirements.
  • High-Accuracy Finish: Delivers workshop-grade tolerances and surface finishes required for interference fits and high-load mechanical interfaces.

Specifications

  • Line Boring: 1 unit — 3" to 14" pipe OD, travel up to 2000mm, hydraulic and pneumatic driven.
  • Internal Attachments: 2 units for internal pipe boring, travel up to 300mm.
  • External Attachments: 4 units for external pipe boring, travel up to 300mm.
  • Internal & external boring application.
Pipe End Preparation
07 — Sub-Service

Pipe End Preparation

With RWNA’s onshore and offshore on-site Pipe End Preparation service, you can eliminate the reliance on oxy/acetylene for end prep. RWNA owns and operates advanced machines engineered for precision bevelling, facing, counterboring, squaring, and other end prep requirements on light wall, heavy wall pipe, tube, or casing — designed for the rigorous demands of onshore and offshore environments.

Key Features

  • Quick and easy set up for fast machining.
  • High-quality bevel, facing, counterbore, and squaring process.
  • Requires minimal clearance for tight access areas.
  • Flexibility to choose from any bevel type (V, J, U, compound, land, etc.) and configurations.
  • Precise measurements and consistent, repeatable results.
  • End prep for elbows, tees, valves, fittings, and complex pipe configurations.

Specifications

  • Size ranges from ¼" to 14".
  • Bevelling, facing, counterboring, and squaring applications.
  • Internal or external clamp mounting.
Cold Tapping, Drilling & Threading
08 — Sub-Service

Cold Tapping, Drilling & Threading

RWNA presents the best cold tapping solution that allows a branch connection to be made into piping or vessels while the system remains live and under working pressure, with no requirement for shutdowns — reducing downtime and costs to our clients.

Benefits

  • Ensures continuous system operations.
  • Reduces downtime and costs.
  • Safe and cost-effective solution, allowing efficient repair or modification.
  • The latest internationally proven software is used to prepare the data for precise tapping operations.
  • With highly competent technicians and engineers as well as a large and comprehensive collection of cold tapping equipment, we are ready to solve ad-hoc site issues and ensure quick and reliable delivery.

Key Features

  • Additional branches allowing supply to and from other areas of the plant.
  • Performed on a variety of piping and vessel materials and mediums.
  • Manual & auto feed — infinitely variable for differing cut conditions.
  • Geared mechanical depth display.
  • Cutting points for isolation equipment (stopples).
  • Cutting, realignment and re-welding of stopple sections are unnecessary.

Specifications

  • 27 units.
  • Ranges from ½" to 12".
Tube Facer
09 — Sub-Service

Tube Facer

With RWNA’s onshore and offshore on-site Tube Facer service, you can eliminate reliance on manual filing, grinding, or imprecise cutting for tube end preparation. RWNA owns and operates advanced Tube Facer machines engineered for precision facing, squaring, and light beveling on thin-walled tubes, stainless steel, titanium, and other alloys — designed for the rigorous service requirements of onshore and offshore environments.

Key Features

  • Quick and easy set up for fast machining.
  • High-quality, burr-free facing and squaring process.
  • Requires minimal clearance for confined spaces.
  • Manual variable for differing sizes on heat exchangers, tube bundles, AFC and other equipment.
  • Light and fast speed feed.
  • Easy to operate.

Specifications

  • 8 units.
  • Ranges from 14mm to 48mm.
Valve Testing & Servicing
10 — Sub-Service

Valve Testing & Servicing

RWNA provides comprehensive valve testing and servicing solutions for all valve types — from on-site repair, lubrication and sealant injection to full workshop overhaul. Our fully equipped workshop and experienced team ensure valves are restored to peak performance, consistently meeting the stringent safety and quality requirements of the oil and gas industry.

Benefits

  • Cost-efficient solution.
  • Increases lifetime of valve.
  • Maintains valve efficiency.
  • Skilled and competent technicians and engineers.
  • Adequate facilities, equipment, and tools for valve services.

Key Features

  • Valve & Actuator Maintenance: removal from site, comprehensive workshop servicing with timely delivery, and on-site repair to minimize downtime.
  • Pressure Safety Valve (PSV) and Relief Valve (RV) Testing with high-quality lapping results and instant test bench output.
  • Grinding Table: surface grinding of sliding wedges, machine components, and workpieces.
  • Surface Lapping Machine: lapping diameters up to 915mm (36").
  • Grinding and Lapping Machine: machining of shut-off and safety valve sealing faces (up to 915mm).
  • Testing Machine and Valve Doc documentation system for recording and printing valve test results.
  • Valve Lubrication (Greasing) and Sealant Injection: performed without dismantling the valve from the pipeline.
  • Periodic maintenance service to extend valve service life.
  • On-Site Grinding and Lapping Spindle Machine: produces a cross-hatched pattern and perfectly level sealing face for safety valves.
  • On-Site Special Tools for Grinding Conical Valve Seats: repairs tapered seats in high-pressure shutoff and control valves using abrasive cones.
Combi Lifter / Bundle Puller & High Pressure Water Jetting
11 — Sub-Service

Combi Lifter / Bundle Puller & High Pressure Water Jetting

With RWNA’s onshore and offshore on-site Combi Lifter/Bundle Puller and High Pressure Water Jetting services, you can efficiently extract, handle, and clean heavy tube bundles and heat exchangers without excessive downtime or risk. Our integrated solutions provide safe, precise bundle pulling and powerful, environmentally friendly cleaning for critical maintenance in petrochemical, oil & gas, and refinery applications.

Combi Lifter / Bundle Puller — Key Features

  • Quick and safe positioning above bundles with easy lock/unlock mechanism.
  • Integrated lifting for Aerial Bundle Extractors, reducing manual handling risks.
  • Handles heavy bundles (up to 50+ tons capacity in standard models).
  • Versatile for horizontal/vertical mounting and field operations.
  • Minimizes setup time and enhances safety during extraction and transport.
  • Suitable for heat exchangers, coolers, and large tubular structures.

High Pressure Water Jetting (HPWJ) — Key Features

  • Powerful, precise cleaning using high-pressure water streams (up to ultra-high levels).
  • Removes scale, fouling, deposits, and coatings from tubes, pipes, vessels, and surfaces.
  • Environmentally friendly — no chemicals required in many applications.
  • Robotic and manual options for safe, hands-free operation in hazardous areas.
  • Versatile for tube bundle cleaning, tank interiors, pipelines, and equipment restoration.
  • Fast, efficient results to restore performance and extend equipment life.

Specifications

  • Combi Lifter/Bundle Puller: 12 total units (6 Bundle Lifters + 6 Combi Lifters).
  • Capacity range: 25 tons to 53 tons.
  • HPWJ: 19 units across 5 models.
  • Combined pressure range: 15,000 PSI to 40,000 PSI.
  • Combined flow rate range: 38 LPM to 216 LPM.

Expert On-Site Machining Solutions

Our skilled technicians are ready to provide precision on-site machining services at your facility. Contact us today to discuss your requirements and schedule service.