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Oil & Gas Steel Pipe: Key Applications and Technical Parameters | Royal Steel Group

Oil and gas steel pipes are one of the key components in the global energy industry. Their rich material selection and different size standards enable them to adapt to various operational scenarios in the oil and gas value chain under extreme conditions such as high pressure, corrosion, and large temperature differences. Below, we will introduce oil and gas pipelines through several core application scenarios.

Oil Drilling Casing

Oil drilling casing plays a crucial role in maintaining wellbore stability, preventing formation collapse, and isolating different geological layers during drilling and production operations. The standards include API, SPEC, and 5CT.

Dimensions: Outer diameter 114.3mm-508mm, wall thickness 5.2mm-22.2mm.

Materials: J55, K55, N80, L80, C90, C95, P110, Q125 (applicable to ultra deep wells).

Length: 7.62m-10.36m is widely used.

Long Distance Oil & Gas Transmission Pipelines

Mainly used for energy transportation, it requires high strength and weldability.

Dimensions: Outer diameter 219mm-1219mm, wall thickness 12.7mm-25.4mm.

Material: API 5L X65 X80Q pipe.

Length: 12m or 11.8m; customized length according to special requirements.

Subsea Oil & Gas Pipelines

Submarine pipelines operate in harsh marine environments and require specialized anti-corrosion and structural reinforcement.

Size: Seamless: Outer diameter 60.3mm-762mm; Weld to 3620mm; wall thickness 3.5mm-32mm (15mm-32mm for deep water).

Material: API 5LC corrosion-resistant alloy tube, X80QO/L555QO； Compliant with ISO 15156 and DNV-OS-F101 standards.

Length: Standard 12m, customized according to special requirements.

Refinery Process Pipes

Steel pipes are required to adapt to harsh conditions such as extreme temperature, pressure, and corrosion.

Dimensions: Outer diameter 10mm-1200mm, wall thickness 1mm-120mm.

Materials: Low alloy steel, corrosion-resistant alloy; API 5L GR.B，ASTM A106 GrB，X80Q。

Length: Standard 6m or 12m; customized length according to special requirements.

ROYAL GROUP

Address

Kangsheng development industry zone,
Wuqing district, Tianjin city, China.

E-mail

sales01@royalsteelgroup.com

Phone

Sales Manager: +8613652091506

Hours

Monday-Sunday: 24-hour Service

Post time: Oct-22-2025