In which stages of oil and gas transportation is S355JR oil pipeline primarily used?
S355JR steel pipelines are mainly used in the midstream stage of oil and gas transportation, for constructing long-distance crude oil and natural gas pipelines, as well as offshore and onshore pipelines.
What oil and gas industry standards must S355JR oil pipelines comply with?
S355JR steel pipelines used in the oil and gas industry must comply with European standards, such as EN 10219 (hollow profiles). Depending on the specific requirements, location, and application of the project, they may also need to comply with ASTM A53, ASTM A106, or API 5L (other types of piping and applications) standards.
What welding processes are mainly used for S355JR oil and gas transmission steel pipelines?
The main welding processes for S355JR oil and gas transmission steel pipelines are longitudinal submerged arc welding (LSAW) and spiral submerged arc welding (SSAW). Resistance welding (ERW) is used for small-diameter, low-pressure applications.
What are the commonly used anti-corrosion treatment methods for S355JR oil and gas transmission steel pipelines?
Common anti-corrosion treatments for S355JR oil and gas transmission steel pipes include protective coatings, such as 3PE (three-layer polyethylene) coatings (composed of fusion-bonded epoxy primer, adhesive, and polyethylene outer layer), polyurethane coatings, and coal tar pitch coatings.
What is the maximum pressure resistance of S355JR oil and gas transmission steel pipes?
The maximum pressure resistance of S355JR steel pipes is not a fixed value. It depends on the pipe size (diameter, wall thickness) and operating conditions, but it is directly related to its minimum yield strength. The minimum yield strength for steel pipes with a wall thickness not exceeding 16 mm is 355 MPa.
