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PROUDLY MADE IN THE UK
FOR SALES ENQUIRIES, SPEAK TO OUR TECHNICAL ADVISORS, 7AM-4PM (MON-THU) 7AM-1PM (FRI)
Papua New Guinea
Colson supplied five types of duplex chemical injection DBB valves for the IDC 26 campaign on the PNG LNG project, with witnessed testing and full documentation.
PNG LNG is an integrated gas development in Papua New Guinea. Its production and processing facilities run from the Hela, Southern Highlands, Western and Gulf provinces to Port Moresby. They are linked by more than 700 kilometres of onshore and offshore pipeline and include a gas conditioning plant at Hides and a two-train liquefaction and storage facility near Port Moresby.
For the IDC 26 campaign, Colson was asked to supply chemical injection DBB valves for end user Santos, a major Australian oil and gas producer with operations in Australia, Papua New Guinea and the US. This is the kind of oil and gas project we are set up for.
The specification was demanding from the start. The valves had to be made in duplex stainless steel from close-to-shape forgings, and the material had to be impact tested to specified values. The order covered 2” and 2-1/16” sizes from Class 600 up to 10,000 psi, with a mix of flanged and screwed connections.
Every size, pressure rating and variation needed its own wake frequency calculation to prove the integrity of the injection probe. The project also brought extensive documentation requirements, a specific packing specification, and witnessed extended hydrostatic and gas testing.
We designed and supplied five valve types. Each was built on a check, ball, needle and ball configuration, and all but one included an injection probe.
| Type | Inlet size | Pressure class | Probe length | Material |
|---|---|---|---|---|
| 1 | 2” | Class 1500 | 178mm | Duplex |
| 2 | 2-1/16” | 10,000 psi | 114 mm | Duplex |
| 3 | 2” | Class 600 | 120 mm | Duplex |
| 4 | 2-1/16” | 10,000 psi | No probe | Duplex |
| 5 | 2” | Class 600 | 207 mm | Duplex |
The duplex material came from close-to-shape forgings that met all the project’s mechanical and chemical requirements. Our team then turned and milled them in house. Every machined component went through Positive Material Identification (PMI), and each valve was supplied with its own wake frequency calculation.
Flanges carried project-specific markings, so that each valve would be installed in the right location and the right orientation on site. Documentation was organised by well designation and submitted across four separate well submittals, in line with our approach to material traceability and documentation. We also wrote a dedicated packing procedure to meet the project specification.
Final testing was witnessed by the contractor and an independent third-party inspector.
We delivered a fully compliant, technically accepted package of chemical injection DBB valves within the project’s delivery schedule. The valves met a demanding combination of material, testing, documentation and logistical requirements.
Because we design, machine, assemble and test every valve under one roof at our Rotherham facility (see our in-house manufacturing), we were able to keep close control of quality and traceability at each stage. We could also respond quickly as the project’s requirements developed.
If you have a chemical injection, DBB or instrument valve requirement, particularly in duplex, super duplex or other exotic materials, our team will be glad to help and we can raise quotes within 48 hours.
See also: Super duplex DBB valve for the Culzean HP/HT gas field and Duplex double block and bleed valves.
Our reputation is built on consistently doing what we say we will. We give realistic lead times, flag problems early, and deliver what we promise. It sounds straightforward, but in industries where supply chain failures are common, it makes a real difference. That is why our customers come back to us, project after project, year after year.
