Anti-corrosion steel pipes : corrosion-resistant (via anti-corrosion treatment) against chemical/electrochemical reactions during transport and use.

Classification

• By manufacturing process: Seamless (hot-rolled/extruded, cold-rolled/drawn, hot-expanded); welded (straight seam, spiral, plate coil butt, hot-expanded welded).

• By shape: Round, square, rectangular, octagonal, hexagonal and other special shapes (complex cross-sections, conical, etc.).

• By use: For pipelines, thermal equipment, machinery, petroleum/geological drilling, containers, chemicals, and special purposes.

Specifications

 • Nominal outer diameter: DN15 - DN2000 (typical).

• Wall thickness: 6 - 20mm (varies with diameter).

 • Length: 6000mm, 12000mm (customizable, ±20mm deviation).

• Material: Carbon steel, stainless steel, alloy steel.

Epoxy Anti-Corrosion Steel Pipe

Epoxy anti-corrosion steel pipes have an epoxy resin coating, offering good anti-corrosion performance for safe, reliable operation in harsh environments, with important applications in industrial and civil fields.

• International standards: ISO 12944-5:2017, ISO 21809-1:2015, ASTM A795/A795M-18.etc

• Coating thickness: ≥300μm (ordinary), ≥400μm (reinforced), ≥500μm (extra reinforced).

3PE Anti-Corrosion Steel Pipe

3PE anti-corrosion spiral steel pipe polyethylene three-layer structure protective layer is also called three-layer PE (3PE), which is an advanced anti-corrosion technology introduced from 
abroad in recent years. 

 •International standards: ANSI/AWWA C104/A21.4 ISO 21809 DIN 30670,etc 

 •Outer diameter: 219.1 mm - 4064 mm (8 inches - 160 inches)

PU Coated Pipe

Polyurethane anti-corrosion steel pipe : a pipe with a steel pipe as the base, and a polyurethane coating is applied on its inner and outer surfaces, or a polyurethane insulation layer and an outer sheath are wrapped around the outside of the steel pipe to achieve the purpose of anti-corrosion and heat preservation. 
•Insulation layer thickness: 30 - 150mm 
•International standard: EN 253:2007 ASTM C592/C592M - 17,etc

IPN8710 Anti-Corrosion Steel Pipe

IPN8710 anti-corrosion water supply pipe is IPN8710 special coating for drinking water. The coating is non-toxic, high solid, low viscosity and is a new type of anti-corrosion coating with strong adhesion, high strength, abrasion resistance, hydrolysis resistance, corrosion resistance, 
water resistance and excellent weather resistance. 

•International standards:  API 5L ASTM A252 EN10219 EN10217 ISO3183 GB/T9711 SY/T5037,SY/T5040, etc. 

•Size: 8 inches - 88 inches 

•Material: GR.A GR.B X42 - 80 S355NLH S460NH S460NLH S275MH S275MLH S355MH  S355MLH  S420MH  S420MLH  S460MH  S460MLH

Plastic Coated Pipe

Plastic-coated steel pipes:hot-dip coated with PE or coated inside and outside with EP, have excellent corrosion resistance, good electrical insulation (no electrical corrosion), low water absorption, high mechanical strength and low friction coefficient for long-term use. 

Coating thickness: generally 0.3-1.0mm, varying with specific requirements and standards.

Relevant international standards: ISO 21809-1:2018, DIN 30670:2012, CSA Z245.20-2010, ASTM A849/A849M-20a and EN 10287.etc

Galvanizing Coated Pipe

TPEP Coated Pipe

Galvanized anti-corrosion steel pipes:made by immersing in molten zinc to form a zinc layer for anti-corrosion.

The zinc layer, as a sacrificial anode, oxidizes before the steel matrix to protect it; even if partially damaged, surrounding zinc still provides electrochemical protection for exposed steel.

 International standards: GB/T 3091 Q195/Q215/Q235/Q345, BS 1387, EN 39, EN 1139 S235JR/S275JR, ASTM A53 GR. A/B/C.

Galvanized layer: 120~500 g/m² (30~70 microns).

TPEP anti-corrosion steel pipe: a new type of anti-corrosion steel pipe, the full name is hot-dip polyethylene powder anti-corrosion steel pipe. It uses a hot-dip process to evenly coat the polyethylene powder on the surface of the steel pipe to form a solid anti-corrosion coating. 
The thickness of the bottom epoxy powder: about 0.1-0.3mm,

the thickness of the middle layer adhesive: about 0.1-0.2mm

the thickness of the outer polyethylene layer: 1.8-3.0mm. 
International standards: ISO 12944 ISO 15156/ NACE MR0175 API 5L,etc

2PE Coated Pipe

Bitumen Coated Pipe

2PE anti-corrosion spiral steel pipes: with inner and outer layers coated with high-quality polyethylene via a special anti-corrosion process, have strong chemical corrosion and wear resistance due to polymer anti-corrosion and protective layers.

They are widely used in petroleum, natural gas, chemical industry, water supply, etc.

Coating thickness: bottom adhesive ~0.1-0.3mm, outer polyethylene layer ~1.8-3.0mm (adjustable per engineering needs).

International standards: ISO 21809-1, ASTM D1000, EN 10305-2.etc

This product: formulated with epoxy resin, coal tar pitch, anti-rust pigment, additives and modified amine, features fast drying, good adhesion, flexibility, two-component packaging and easy construction, along with resistance to acid, alkali, salt, water and oil.
It conforms to international standards ISO 21809-2 and AWWA C210. Coating thickness: ordinary grade (≥400μm, one cloth and two oils), strengthened grade (≥600μm, two cloths and three oils), extra-strength grade (≥800μm, three cloths and four oils).

Specification

Product type

Anti-corrosion process/Coating material 

Core characteristics

Coating Thickness specification

International standards

Main application fields 

Plastic-coated steel pipe

Hot-dip coated with PE or coated inside and outside with EP

Excellent corrosion resistance, good electrical insulation (no electrical corrosion), low water absorption, high mechanical strength, low friction coefficient, suitable for long-term use

Generally 0.3-1.0mm, adjustable according to specific requirements and standards

ISO 21809-1:2018, DIN 30670:2012, etc.

Petroleum, natural gas, chemical industry, water supply, etc.

Epoxy Coal Tar Pitch Anti-corrosion Coating Products

Made of epoxy resin, coal tar pitch, etc., two-component packaging

Fast drying, good adhesion, excellent flexibility, convenient construction, resistant to acid, alkali, salt, water and oil

Ordinary grade ≥400μm (one cloth and two oils); Strengthened grade ≥600μm (two cloths and three oils); Extra-strength grade ≥800μm (three cloths and four oils)

ISO 21809-2, AWWA C210

Pipeline-related projects requiring anti-corrosion

2PE Anti-corrosion Spiral Steel Pipes

Special anti-corrosion process, inner and outer layers coated with high-quality polyethylene

Strong chemical corrosion resistance and wear resistance due to polymer anti-corrosion layer and protective layer

Primer thickness about 0.1-0.3mm, outer polyethylene layer thickness about 1.8-3.0mm, adjustable according to engineering requirements

ISO 21809-1, ASTM D1000, etc.

Petroleum, natural gas, chemical industry, water supply, etc.

Galvanized Anti-corrosion Steel Pipes

Steel pipes immersed in molten zinc to form a zinc layer on the surface

Zinc layer acts as a sacrificial anode, oxidizes before the steel matrix; even if partially damaged, surrounding zinc still provides electrochemical protection for the exposed steel

Galvanized layer 120-500g/m² (30-70 microns)

GB/T 3091, BS 1387, ASTM A53, etc.

Various pipeline projects requiring anti-corrosion