I. Product Name:

Technical consultation on fuel transmission line pipes.

II. Scope of Supply:

Consulting services cover the selection of forming processes (LSAW/SSAW/seamless pipe) for fuel transportation pipelines (crude oil, refined oil, natural gas, condensate), pipe diameter and pressure rating matching, low-temperature toughness steel grade selection, 3LPE external corrosion protection solutions, pipe end beveling design, and welding construction guidance. Consultation content includes: recommended forming methods for pipe diameters from DN400 to DN2200, end cap protection and stacking solutions for export pipeline projects, and interpretation of the entire process quality inspection system.

III. Main Products/Material Brand Range:

Product types: LSAW straight seam submerged arc welded fuel pipeline, SSAW spiral submerged arc welded fuel gathering and transportation pipeline, seamless hot-rolled fuel branch pipeline.

Material steel grade: L245–L555 (API 5L PSL2), low temperature low alloy steel (-20℃/-40℃ toughness grade).

Implementation standards: API 5L PSL2, ISO 3183, GB/T 9711, DNVGL-ST-F101 (subsea pipeline).

Corrosion protection components: 3LPE external corrosion protection, FBE internal drag reduction, and blue plastic end caps for rust prevention.

Brand: Hebei Haiganwei Steel Pipe Co., Ltd. (HSPC).

IV. Supply Cooperation Forms:

Supports the overall supply of fuel transmission pipelines with diameters from DN400 to DN2200.

Supports mixed supply of multiple forming methods (LSAW main line + SSAW branch line + seamless pipe branch).

We provide integrated pipe end beveling, end cap protection, and 3LPE anti-corrosion coating.

Support for export EPC projects: We can provide a complete set of test reports in English (UT/RT/HT/mechanical properties/chemical composition) and coordinate third-party inspections.

V. Online Consultation Channels:

Official website: www.haiqianwei.com / www.hspc.cc

Email: [email protected]

Contact Person: Manager Liu

Landline: 0317-6091369 / 0317-6091368

Online paid consultation platform ($9.9 USD/session).

VI. Detailed Product Specifications:

Parameter 1 (Pipe diameter range and forming method matching): DN400 – DN2200. LSAW forming (DN400–DN2200 ultra-large diameter trunk lines), SSAW spiral forming (oilfield gathering and transportation branch lines, flexible pipe diameter adjustment), seamless hot rolling (small diameter high-pressure branches), flexibly matched according to the project pipe diameter and pressure level.

Parameter 2 (Hydrostatic test pressure): Each steel pipe is subjected to a hydrostatic test at 1.5 times the design working pressure to verify the sealing performance. The test pressure usually covers PN6.4–PN16 (approximately 0.6–1.6 times the yield strength) to ensure that the pipeline is leak-free under operating pressure.

Parameter 3 (Low-temperature Charpy impact energy): The Charpy V-notch impact energy of the low-temperature low-alloy steel grade is ≥40J (average value) under the conditions of -20℃ to -40℃, which meets the hard requirements of low-temperature toughness of pipelines for oil and gas transportation projects in extremely cold regions.

VII. Parameter Correspondence and Function Description:

Pipe diameter range and forming method matching (DN400–DN2200): The core value of matching multiple forming methods lies in the following: LSAW pipes have large diameters, thick walls, short welds parallel to the pipe axis, high internal weld smoothness, low medium flow resistance, and low scaling tendency, making them suitable for high-flow, long-distance trunk line transportation; SSAW pipes can flexibly adjust the pipe diameter using steel coils of different widths, suitable for branch line scenarios with varying pipe diameters and uneven flow rates in oilfield decentralized gathering and transportation networks; seamless pipes are used for small-diameter, high-pressure branch sections, withstanding pump station outlet pulse pressure and valve switching water hammer impacts. The combination of these three types covers the entire chain requirements of the fuel transportation system from wellhead → gathering and transportation → trunk line → branch.

Hydrostatic test pressure (1.5 times design pressure per pipe): The hydrostatic test at 1.5 times the design pressure per pipe is a rigorous verification of the pipe's sealing performance before it leaves the factory. By holding the pressure at 50% higher than the actual operating pressure, penetrating defects such as porosity, slag inclusions, and lack of fusion in the weld can be detected, ensuring that every steel pipe delivered to the site will not leak under the rated operating pressure. This is the first line of defense for pipeline operation safety and a mandatory item for EPC project acceptance and third-party inspection.

Low-temperature Charpy impact energy (-20℃ to -40℃ ≥40J): Low-temperature toughness is a mandatory technical indicator for fuel pipelines in extremely cold regions (such as the Russian Far East, Arctic oil and gas fields, and Alberta, Canada). At low temperatures, the ductile-brittle transition temperature of carbon steel rises, and ordinary materials will undergo brittle fracture. An impact energy ≥40J means that the material is still in the ductile fracture zone at this temperature, and can absorb impact energy through plastic deformation at the crack tip, preventing rapid crack propagation and avoiding catastrophic pipeline brittle fracture accidents.