Products Description

Carbon steel line pipes are special high and low pressure pipes that transport various fluids such as oil, natural gas, deep water, etc. extracted from underground to processing equipment through pipelines. They are divided into seamless pipes and welded pipes, and are connected by end welding, clamps, sockets, threads, etc.

Role And Advantages Of Carbon Steel Line Pipes

1. Good corrosion resistance. The inner wall of the steel pipe is treated by spraying, composite lining and other processes to effectively resist corrosion and oxidation.
2. High pressure resistance. The pressure level can be greater than Class1500/40mpa/3000psi, and can withstand high-pressure conveying media.

3. High safety. In order to ensure the safety and reliability of the conveying medium, the pipe wall thickness will be strictly tested.

4. High tensile strength. It has good strength and toughness. The tensile strength can reach a maximum of 850MPa or more.

The Use And Function Of Carbon Steel Line Pipes

1.Applicable to centralized transmission pipelines and long-distance transmission pipelines in oil and gas fields, suitable for various fluid media, high-pressure and high-temperature pipeline equipment

2. Can be used in pipelines for fire protection, water supply, drainage, gas, etc. in construction projects

3. Suitable for pipelines for corrosive media such as acids and alkalis in the chemical and energy industries

4. Can also be used as structural support pipes for deep-sea marine oil and gas pipelines and road projects.

Specification Table

Category	Details
Material	Carbon steel (API 5L Gr. B/X42, for general use); Alloy steel (X65/X80, for high pressure); Stainless steel (316/2205, for corrosive fluids); Coated carbon steel (FBE/3LPE, for corrosion protection)
Chemical Composition	Carbon steel: C ≤0.26%, Mn 1.1-1.6%; High-strength alloy (X80): C ≤0.08%, Nb 0.04-0.08%, V ≤0.06% (enhances toughness); Stainless steel (316): Cr 16-18%, Ni 10-14%, Mo 2-3% (corrosion resistance)
Mechanical Properties	Tensile Strength: API 5L B: 415-565 MPa; X80: 555-705 MPa; 316: ≥515 MPa Yield Strength: API 5L B: ≥245 MPa; X80: ≥555 MPa; 316: ≥205 MPa Elongation: ≥20% (carbon/alloy); ≥40% (stainless)
Pressure & Corrosion Resistance	Carbon steel: Up to 10 MPa (standard); X80: up to 25 MPa (high pressure); Stainless steel: Resists H₂S, CO₂, seawater; Coated pipes (3LPE): Good in soil/atmospheric corrosion
Temperature Range	Service: -40°C to 450°C (varies by material); carbon steel for ambient temps; alloy/stainless for high-temp fluids (e.g., steam, hot oil)
Form & Dimensions	Type: Seamless (high pressure); welded (ERW, LSAW, for long-distance pipelines) Outer Diameter: 21.3mm-1422mm (8"-48" common for oil/gas); Wall Thickness: 2mm-25mm Length: 6m-12m (welded); up to 18m (seamless)
Standards Compliance	API 5L (oil/gas line pipes); ASTM A53 (carbon steel); EN 10217-1 (European welded); ISO 3183 (petroleum/gas pipelines)
Fabrication	Welded: ERW (electric resistance welding) for small sizes; LSAW (longitudinal submerged arc) for large diameters Seamless: Hot-rolled/extruded (no welds, high integrity) Coating: FBE, 3LPE (anti-corrosion)
Key Applications	Oil & Gas: Crude oil, natural gas transmission/distribution pipelines Water: Municipal water supply, wastewater transport Industrial: Chemical fluid lines, steam pipelines, slurry transport Power: Cooling water, fuel oil lines
Key Advantages	High-strength alloy grades enable long-distance, high-pressure transport; welded pipes cost-effective for large-scale projects; coated options extend service life in corrosive soil/seawater; versatile for diverse fluids