VIENERGY | Pipe

What we do best

Strength, consistency, and
certainty in every length

Our pipes are built to perform in harsh field conditions—high pressure, corrosive media, thermal cycling, and long-distance routing. By pairing strict metallurgy control with reliable weld integrity and precise dimensional tolerance, we help operators maintain pipeline safety, minimize leak risks, and secure consistent throughput across the asset’s lifecycle.

Certified quality with
engineered-to-spec manufacturing

We offer a full range of API-grade casing & tubing and transmission pipes—covering H40, J55, K55, N80, X-grades and more. Each product is manufactured to API 5CT, API 5L, GOST, or GB/T standards, with options for HFW/ERW or SSAW welding, specialized coatings, tight OD/ID tolerance, and cut-to-length supply. Custom production is available to match unique well, pipeline, or utility requirements without compromising delivery reliability.

Casing & Tubing Pipe

Petroleum Casing & Tubing Pipes include a full range of non-upset and external-upset tubing in steel grades H40, J55, K55, and N80.

Manufactured in accordance with API Spec 5CT, they offer stable, reliable quality and fully meet the operational needs of oil field extraction.

Application

Oil extraction, Transportation of petroleum/natural gas/wate/mineral slurry/coal gas/other confined long–distance transportation pipeline, Large project constructions

Standard

API Spec 5CT

Steel Grade

H40(Basic), J55, K55, N80(Strong)

End Type

Non-upset tubing, External-upset tubing

Welding Method

HFW (High-Frequency Welding)

Pipe Length

8 -12.5m

Transmission/Line Pipe

HFW, SSAW Fluid Transmission and Line Pipes are available in X80 and lower grades, manufactured to API 5L, GOST, GB/T 9711, and low-pressure fluid transmission standards. Customized production available.

Application

Oil & Gas Transmission, Low-Pressure Fluid Transmission, Water Transmission, Carbon Capture & Hydrogen/Geothermal Pipelines

Standard

API Spec 5L, GOST, GB/T 9711.1-1997, GB/T 9711.2-1999, and low-pressure fluid transmission specifications

Steel Grade

Up to X80

End Type

Non-upset tubing, External-upset tubing

Welding Method

HFW (High-Frequency Welding), SSAW (Spiral-seam Submerged Arc Welded)

Pipe Length

8 -12.5m

LSAW Pipe

Standard

API 5L, API 2B, GB/T9711, ISO3183, DNV-OS-F101 and other customer standards

Specification

ISO3183, API SPEC 5L, API SPEC 2B, GB9711, DNV-OS-F101

Steel Grade

A25, A, B, X42 - X120

Pipe Length

8 -12.5m

Thickness

8 - 60mm

SAWH Pipe (Submerged Arc Helical Welded Pipe)

Application

long-distance pressure pipelines for oil/natural gas/water/coal gas in chemical engineering, electric power, irrigation, structural applications, and piling projects.

Standard

API Spec 5L, GB/T9711, GB/T3091, SY/T5037, SY/T5040, SY/T5768, ASTM, ASME, and other technical conditions specified by the user

Certification

Special Equipment Manufacturing License, API 5L Monogram License, ISO9001:2015, API Q1 quality system certifications

Pipe Diameter

Φ219 mm – Φ3050mm

Steel Grade

A, B, X42–X120; L175–L690; Q235, Q355, etc.

Bend & Fitting

1. Hot Induction Bend

Diameter

DN200 - 1600mm

Thickness

6.4 - 60mm

Steel Grade

A25, A, B, X42 - X120

Angle

0-90°

Bend Radius

1-10m

2. Pipe Fitting : Tee, Bends (Bending Radius: 1D/1.5D), Tapered Pipes, Pipe Caps

Diameter

DN25 - 1600mm

Thickness

5.0-80mm

Steel Grade

A, B, X42-X100

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3. Anti-corrosion for Bends and Pipe fitting

Processing Range

Anti-corrosion treatment on the bends and pipe fittings (T-joints, bends, pipe caps and temperer pipes) with nominal diameter of DN150-1500

Anti-corrosion Type

1. Single-layer epoxy powder, double layer epoxy powder 

2. Single-layer epoxy powder + polyethylene or polypropylene cold-applied tape 

3. Solvent-free two-component liquid epoxy paint + polyethylene or polypropylene cold-applied tape

4. Polyurethane + polyethylene or polypropylene cold-applied tape

We deliver infrastructure that performs — from first concept to final energization. Our teams combine EPC depth, equipment integration, and data-driven control to turn complexity into predictable results. Let’s connect and build what lasts.