Our team of highly skilled coded welders operates to standards including BS 4515-1:2009, API 1104 and ASME 9. Our standards apply equally to varying steel pipeline diameters, wall thicknesses and pressure ranges. We can advise on design detail and support any installation work.
We regularly weld on live mains (hot tapping). Prior to hot tapping, we identify wall thickness and grade to ensure suitability by sampling the pipe material. The photo below shows a typical example of the type of work we can do on site: a double stopple operation carried out with Group 1 P9 Hot Tap Tees, fully welded under line pressure, with a pipe wall thickness below 4.9mm.
We are able to construct intricate steel pipework fabrications off-site at our depots in Ambergate, Hitchin and Knowsley. Our welders and welding inspectors also carry out on-site repairs and planned works to existing pipelines and plant. While our in-house radiography and phased array inspection services support our off-site fabrication works.
Where required, we issue quality-assurance packages, including: welding inspection report, weld acceptance sheet, coating inspections daily form, a non-destructive examination service with full quality assurance, and any manufacturer's certification. Our in-house QA/QC team provides this service, ensuring the final documentation includes the relevant information and is correct. Our entire team is regularly monitored to ensure quality and competence.
Our welders undertake work to P1, P2, P8 and P9 standards across the complete pipeline diameter and pressure range. We can also construct complex steel fabrications and carry out repairs to existing pipelines and plant. In addition, we offer surface preparation and application of paint or multi component liquid coating systems.