Services & Processes

Capabilities Across Industries

OPD is a recognized provider of conceptual design, detailed engineering, procurement, fabrication and construction services for the gas processing and petrochemical industries. Click the tabs below for detailed listings of our capabilities.


OPD offers consulting services designed to aid our clients in evaluating the feasibility of proposed projects.

  • Conceptual Designs
  • Budget Cost Estimates
  • Project Schedules


OPD provides clients with detailed engineering packages in all disciplines, including 2-D and 3-D AutoCAD design drawings.

  • Process
  • Mechanical
  • Civil / Structural
  • Instrumentation and Electrical


OPD provides single point procurement of all equipment, materials, and construction services necessary to fabricate and construct our clients' projects

  • Process Equipment
  • Piping Materials
  • Electrical Materials
  • Instrument Materials
  • Civil / Structural Materials
  • Subcontract Services
  • Building
  • Insulation
  • Painting
  • Stress Relief


Our fabrication shop provides pipe spools, ASME coded vessels, skids and skid assembles, and structures.

  • Piping per ASME and NFPA
  • New Pressure Vessels per ASME
  • Pressure Vessel Repairs and Alterations per NBIC
  • Piping and Equipment Skids
  • Steel Structures


Our field crews perform all phases of field construction from initial site work to start-up.

  • Earth / Site Work
  • Civil
  • Structural
  • Mechanical
  • Electrical
  • Instrumentation
  • Testing
  • Start-Up

What We Do

From NGL recovery to gas and refrigeration compression, every project – and every client – has our full attention.


Each plant design is chosen to meet the specific requirements of the client, ranging from high ethane recovery to residue gas BTU or hydrocarbon dew point control.


OPD offers solutions to all gas and liquid treating problems. Each process is selected to meet the client's specific needs and to provide a safe and energy efficient facility.


OPD offers a wide range of applications to meet all gas and liquid dehydration requirements. All facilities are designed and built to client-specific requirements.


OPD designs and constructs heat medium systems utilizing various heat transfer fluids. These systems are selected based on specific needs of the process.


OPD designs, constructs, and installs waste heat recovery systems for gas turbines and reciprocating gas engines.


OPD solves all your NGL fractionation needs from new facilities to de-bottlenecking of older units. Our fractionators vary from one tower to multiple towers as required.


OPD offers complete process design and construction of block mounted or skid-mounted Natural Gas Liquids (NGL) Stabilization systems.


OPD provides complete system design and installation for our client's gas and refrigeration compression requirements.


OPD has years of experience using propane refrigerant in the process design, mechanical design, and construction of dew point control plants, straight refrigeration plants, refrigerated-JT plants, and cryogenic plants. OPD has installed both reciprocating compression and oil-flooded screw compression for propane refrigeration systems. OPD has the experience and knowledge to employ other refrigerants if desired.


OPD can develop plant designs using proprietary processes for NGL recovery. OPD also has working relationships with with major solvent companies for treating gas and liquids. OPD has knowledge and experience in the design and construction of plants for oxygen removal from natural gas.