Shuangsen — engineered stainless steel oil and gas pipe solutions for high-pressure, corrosive environments. As a direct manufacturer with 25+ years in metallurgy, we supply seamed/welded pipe, groove & press fittings, and custom dimensions. Our pipe stands up to H₂S, chlorides, and extreme temperature cycles, widely specified in upstream collection, downstream refining, and AI cooling loops. Each lot undergoes online bright solid melting and in-line roundness control. From 304L to 316L, we deliver consistent wall thickness, ±0.25 mm tolerance, and documented traceability. Choose a supplier that combines ISO 13485, 14001, and national “Little Giant” expertise with on-time logistics via Ningbo/Shanghai ports.

We produce round, square, and rectangular profiles, with surface finishes from mill to 600# buffed. Beyond the pipe itself, we supply matched press-fit, groove, and lock-expansion fittings, creating a complete system for modular installation. Backed by ISO 9001, 14001, and 45001, every bundle carries mill test reports; optional SGS inspection is also available. Whether it’s offshore platform piping, AI data-center cooling, or food-grade hygiene lines, this equipment meets API-style requirements with a 25–45 day lead time for custom orders.

stainless steel oil and gas pipe

Critical performance for energy transmission

Pipe used in oil and gas environments must resist pitting, stress corrosion cracking, and high-velocity erosion. Our manufacturing protocol addresses each risk with proven metallurgical control.

Corrosion resistance: 304/316L grades with low carbon content (≤0.03%) minimise carbide precipitation in welded zones.
Mechanical integrity: Tensile strength up to 515 MPa (316L) ensures stable performance under fluctuating pressures.
Dimensional stability: Online roundness control keeps ovality within 1.0% D, reducing stress risers at coupling points.
Surface finish options: Mill, 180#–600# buffed, or hairline – select the finish that matches flow efficiency and cleaning protocols.

These properties make the stainless steel oil and gas pipe a preferred choice for gathering lines, heater treaters, and glycol dehydration units.

Precision manufacturing and quality gateways

All production follows a closed-loop quality system, from coil slitting to final packaging. Three in-process inspections (forming, welding, finishing) are supplemented by non-destructive eddy-current testing.

Raw material certificate (mill test report) accompanies each heat.
Weld seam is 100% penetrated; internal weld leveling technology removes bead irregularity.
Solid solution treatment is performed in a bright annealing furnace with protective atmosphere, ensuring scale-free surfaces.
Final dimensional checks using laser micrometers and plug gauges.

This rigorous approach has earned classification as “National high-tech enterprise” and “Specialized, Refined, Unique, New” Little Giant.

Surface finish availability

Item	Round tubes		Square & Rectangular tubes
Item	Finish	Description	Finish	Description
Surface brightness	Mill Finish 180# 400# 600# Hairline 180# Hairline 400#	As welded Buffed after polishing by 180# Buffed after polishing by 400# Buffed after polishing by 600# Hairline finished after polishing 180# Hairline finished after polishing 180#	Mill Finish 180# 400# 600# Hairline 180# Hairline 400#	As welded Buffed after polishing by 180# Buffed after polishing by 400# Buffed after polishing by 600# Hairline finished after polishing 180# Hairline finished after polishing 180#

Dimensional tolerances (ASTM A484)

Thickness (mm)	Thickness tolerance	Width tolerance
Permissible Variation in Dimensions according to ASTM A484
Over 2.90 to 3.30, incl	±0.25mm ±0.30mm ±0.35mm +1.25mm-0.25mm	+2.4 -0.8
Over 3.30 to 3.70, incl
Over 3.70 to 4.80, excl Over 4.80 to 9.00, excl

Solid solution treatment reference

GB		ASTM		JIS
Type	Solution (℃)	Type	Solution (℃)	Type	Solution (℃)
0Cr19Ni9	1010-1150 water sharp quenching	TP304	1010-1150 water sharp quenching	SUS304	1010~1150 water sharp quenching
00Cr19Ni11		TP304L		SUS304L
0Cr17Ni12Mo2		TP316		SUS306
00Cr17Ni14Mo2		TP316L		SUS306L

Weight calculation (per meter)

Type		Density (g/cm³)	Formula
0Cr19Ni9 / SUS304 / TP304	00Cr19Ni11 / SUS304L / TP304L	7.93	W = 0.02491·t·(D-t)
00Cr17Ni14Mo2 / SUS306 / TP316	0Cr17Ni12Mo2 / SUS306L / TP316L	7.98	W = 0.02507·t·(D-t)

Where: t = wall thickness (mm), D = outer diameter (mm).

Proven in demanding sectors

Beyond oil and gas, the stainless steel oil and gas pipe is deployed in:

AI computing data centres – cooling systems for Huawei, Envicool, requiring leak-proof piping and fast thermal exchange.
Water supply & plumbing – potable water and heating networks where hygiene and durability are mandatory.
Food & beverage processing – CIP lines, dairy, and beverage transfer.
Automotive and energy – exhaust components and heat exchanger tubing.

This wide applicability stems from the product’s consistency, clean internal surfaces, and ability to be welded, grooved, or press-fitted without weakening.

stainless steel oil and gas pipe

Frequently asked questions

1. Can dimensions be customised?
Yes. Special diameters, wall thicknesses, and lengths are produced per drawing. OEM orders are accepted with a minimum quantity.

2. Manufacturer or intermediary?
Direct manufacturer. The 20,000 m² facility houses 133 welded pipe lines and full heat-treatment capabilities.

3. Sample availability?
Samples are provided free of charge, with freight payable by the receiver. Standard samples ship within 3 days.

4. Factory visits?
On-site or virtual tours are welcomed. A technical team accompanies each visit.

5. Quality assurance?
Three inspection holds (production, cutting, packaging). Mill certificates accompany every shipment; third-party inspection (e.g., SGS) can be arranged.

6. Lead time?
Stock items: 3–10 days. Custom production: 25–45 days depending on quantity and grade.

7. Shipping arrangement?
We cooperate with long-term freight forwarders, offering competitive sea freight via Ningbo or Shanghai ports.

8. No import experience?
We handle documentation and logistics; only an import license is required.

Why choose this equipment

In-house metallurgical control – from coil to finished pipe, all processes are managed within the factory.
International certification – ISO 9001, 14001, 45001, and medical-device standard ISO 13485.
Advanced welding technology – online weld leveling and bright annealing produce a smooth, consistent bead.
Flexible surface treatments – six finish options for round and rectangular profiles.
Traceable quality – each batch includes chemical and mechanical test reports.
Global shipping experience – over 25 years exporting to North America, Europe, Middle East, and Southeast Asia.

Technical support and after-sales

Technical data sheets, welding procedure recommendations, and installation guidelines are available for each product. For special requirements—such as low-temperature impact testing or NACE MR0175 compliance—the engineering team provides direct consultation.

All pipe is packed in wooden crates or steel bundles to prevent damage during ocean transit. End caps and protective wrapping are standard.

Shuangsen Pipe Industry — committed to building a world-renowned Chinese national independent pipeline brand. With 25 years of focused innovation, the product portfolio continues to evolve, yet the commitment to quality, durability, and precise engineering remains unchanged. For stainless steel oil and gas pipe, fittings, and complete system solutions, Shuangsen stands as a trusted manufacturer and supplier in the global market.