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DIN30670 PE Coating Pipe

Coating pipe is the pipe that is by the processing after the corrosion, which can effectively prevent or slow the steel pipe occurs in the course of transport and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs pipe.
Product Details:

DIN30670 PE Coating Pipe

Product name

3PE coating pipe for ERW pipes DIN30670

Out diameter

21.3mm-3048mm, 1/2”-120”

Wall Thickness


Coating Material

Liquid Epoxy Paint
PE, 2PE, 3PE (Polyethylene);
2PP, 3PP (Polypropylene)
Epoxy Coal Tar; Epoxy Coal Asphalt;
Cement Mortar Lining;
Polyurethane Foam Insulation
Polyurethane Paint
Blue 3PE/ FBE
Interzone 954 Paint
Heat/ Cold Shrinkable Tapes
Plastic/ Rubber Lining


DIN30670, CAN/CSA-Z245.21-M92, CAN/CSA-Z245.20-M98, AWWA C210,

Quality grade

First class, prime, newly produced


Plain end, beveled, spigot & socket joint, cut square, grooved, threaded and coupling, etc.


Small sizes packed by steel strips into bundles, big sizes in loose pieces; can be packed as customers’ special requirements


Appearance Check
Dry Film Thickness Measurement
Peeling Strength Test
Cathodic Disbonding Test
Impact Strength Test
Flexibility Test
Shot Blasting
Surface Roughness
Holiday Detection


- Used for buried or submerged service
- For oil or gas pipeline systems
- Used in the potable-water-supply industry for steel water pipelines installed underground or underwater, under normal construction conditions.
- Preformed directly buried insulating pipes for polyurethane(PUR) foamed-plastics and high density polyethylene(PE) protect pipes

DIN  30670 seamless coating pipe with Polyethylene coatings

Coating  pipe is the pipe that is by the processing after the corrosion, which can  effectively prevent or slow the steel pipe occurs in the course of transport  and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe  can effectively prevent or slow down the corrosion of steel pipes to extend  service life and reduce operating costs pipe.

The  coatings are suitable for the protection of buried or submerged steel pipes at  design temperatures of –40 °C up to +80 °C.

The  present standard specifies requirements for coatings that are applied to  longitudinally or spirally welded or seamless steel pipes and fittings used for  the construction of pipelines for conveying liquids or gases.


DIN  30670: Polyethylene coatings of steel pipes adn fittings.

DIN  30678: Polythylene coatiing of steel pipes and fittings.

SY/T0413-2002:  Technical standard of polythelene coating for buried steel pipeling.

Anti-corrosion coating: 

Various  steel pipe external coating projects are currently implemented by our company  including single-layer/double-layer FBE, 2PE,3PE,3PP and other anti-corrosion  coatings with the performed standards such as DIN30670,  DIN30671,DIN30678,CAN/CSA-Z245.21-M92,SY/T4013-2002 and SY/T0315-97 etc.

Quality Control

Quality is vital for an  enterprise. Our production process is fully performed according to ISO9001-2008 quality management system. We carry on strict quality control in all steps from  product R&D, material procurement, processing to after-sale service.

Sales Network

North America
United States, Canada, Mexico
South America
Colombia, Venezuela, Brazil,  Chile, Argentina, Peru
South Africa, Egypt, Nigeria,  Algeria
Korea,Russia, Myanmar, Brunei,  Cambodia, Indonesia, Malaysia, Philippines, Singapore, Thailand, Vietnam,Bangladesh, India, Pakistan, Sri Lanka,Kazakhstan,Tajikistan, Iran,  Jordan, Kuwait, Lebanon,Oman, Saudi Arabia, U.A.E, Yemen, Israel
Netherlands,England, Belgium,  France, Austria, Germany, Italy
Australia, New Zealand

What are Steel Pipes?

Steel pipe is long, hollow tube that are used in the piping system to  transport liquid, gas and sometimes solids.
Divided into carbon structural steel pipe, low alloy structural  steel pipe, alloy steel pipe and composite steel pipe according to the  material; divided into conveying pipeline, engineering structure, thermal equipment, petrochemical industry, machinery manufacturing, geology according  to the purpose For drilling, steel pipes for high-pressure equipment, etc.;  according to the production process, it is divided into seamless steel pipe and  welded steel pipe. The seamless steel pipe is divided into hot rolling and cold  rolling (pulling). The welded steel pipe is divided into straight seam welded  steel pipe and spiral seam welding.

Steel pipes are not only used to transport fluids and powdered  solids, exchange heat, manufacture mechanical parts and containers, but are  also an economical steel. The use of steel pipes to manufacture building  structure grids, pillars and mechanical supports can reduce weight, save 20-40%  of metal, and achieve mechanized construction. The use of steel pipes to  manufacture highway bridges not only saves steel and simplifies construction,  but also greatly reduces the area of the protective coating and saves investment and maintenance costs.

1 Material

4 Types

2 Classification

5 Sizes and dimensions

3 Standards

6 Uses

Material of steel pipe

Ferrous Metal

Non-Ferrous Metal

Classification of Steel Pipe

Classified by Production Methods

According to the production  method, steel pipes can be divided into two categories: seamless steel pipes  and seamed steel pipes, and seamed steel pipes are referred to as straight seam  steel pipes.

The welded steel pipe is  formed by welding a steel plate rolled into a tubular shape by a seam or a  spiral seam. In terms of the manufacturing method, it is further divided into a  welded steel pipe for low-pressure fluid transportation, a spiral-welded  electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe,  and the like. Seamless steel pipes can be used in liquid pressure pipes and gas  pipes in various industries. Welded pipes can be used for water pipes, gas  pipes, heating pipes, electrical pipes, etc.

Classified by material

Steel pipes can be divided  into: carbon pipes and alloy pipes, stainless steel pipes, and the like.
 Carbon pipes can be divided into ordinary carbon steel pipes and  high-quality carbon structural pipes.
 Alloy tubes can be further divided into: low alloy tubes, alloy  structure tubes, high alloy tubes, high strength tubes. Bearing tubes,  heat-resistant and acid-resistant stainless steel tubes, precision alloys (such  as Kovar) tubes, and high-temperature alloy tubes.

Classified by connection

The steel pipe can be  divided into the light pipe (the pipe end is not threaded) and the wire pipe  (the pipe end is threaded) according to the pipe end connection mode.
 The wire tube is further divided into: ordinary car wire tube and  tube end thickened wire tube.
 Thickened wire tube can also be divided into: outer thickening  (with external thread), inner thickening (with internal thread) and inner and  outer thickening (with internal and external thread) and other ground wire  tubes.
 If the wire tube is threaded, it can be divided into: ordinary  cylindrical or conical thread and special thread.
 In addition, according to the needs of users, the wire tube is  generally equipped with a pipe joint delivery.

Classified by plating characteristics

The steel pipe can be  divided into black tube (not plated) and plated coated tube according to the  surface coating characteristics.
 The coated tubes are galvanized, aluminized, chrome-plated,  aluminized, and other alloyed steel tubes.
 The coated tube has an outer coated tube, an inner coated tube,  and an inner and outer coated tube. Commonly used coatings are plastic, epoxy,  coal tar epoxy and various glass type anti-corrosive coatings. Galvanized pipes  are further divided into KBG pipes, JDG pipes, threaded pipes, etc.

Classified by application

Steel pipes use can be  divided into:

Types of steel pipes

Straight seam steel pipe

Seamless steel pipe

Precision steel pipe

Straight seam steel pipe

Straight seam steel pipe is  a steel pipe whose weld is parallel to the longitudinal direction of the steel  pipe. Usually divided into metric electric welded steel pipe, welded thin-walled  pipe, transformer cooling oil pipe and so on. Straight seam welded pipe has  simple production process, high production efficiency, low cost and rapid  development. The strength of the spiral welded pipe is generally higher than  that of the straight welded pipe. It is possible to produce a welded pipe with  a large diameter by using a narrow blank, and it is also possible to produce a  welded pipe having a different pipe diameter by using a blank of the same  width. However, compared with the straight pipe of the same length, the weld  length is increased by 30 to 100%, and the production speed is low.
 General welded pipe: Generally  welded pipe is used to transport low pressure fluid. Made of Q195, Q215A, Q235A  steel, Q235B carbon. Straight seam steel pipes are subjected to  experiments such as water pressure, bending and flattening, and have certain  requirements on the surface quality. Usually, the delivery length is 4-10 m,  and the fixed length (or double rule) is often required. The specification of  the welded pipe is expressed by the nominal diameter (mm or inch). The nominal  diameter is different from the actual one. The welded pipe has two kinds of  ordinary steel pipe and thick steel pipe according to the specified wall  thickness. The steel pipe is divided into two types according to the pipe end  and the thread.
 The welding process of submerged arc welded straight seam steel  pipe is submerged arc welding technology, which uses filler welding and  particle protection flux submerged arc. The caliber of the production can reach  1500mm. LSAW is the English abbreviation for submerged arc welded straight seam  steel pipe. The production process of submerged arc welding straight seam steel  pipe has JCOE molding technology and roll-formed submerged arc welding technology.  When the diameter is large, it may be rolled with two steel plates, which will  form a double weld. Standard GB/T3091-2008 low-pressure fluid steel pipe  production standard, GB/T9711.1-2 -1997 oil and gas steel pipe production and  use standards can be implemented, and can also implement the US API 5L pipeline  steel pipe implementation standard. Production material: Q195A-Q345E; 245R;  Q345QA-D; L245-L485; X42-X70. The pressure parameters are mainly 2ST/T, S is  the yield strength, and T is the wall thickness. Submerged arc welding has been  developed to have double-wire submerged arc welding and multi-wire submerged  arc welding, and the efficiency is further improved.

Production process of straight seam steel pipe

According to the production  process, straight seam steel pipes can be divided into high-frequency straight  seam steel pipes and submerged arc welded straight seam steel pipes. Submerged  arc welded straight seam steel pipes are further divided into UOE, RBE, JCOE  steel pipes according to their different molding methods. The following  describes the most common molding processes for high-frequency straight seam  steel tubes and submerged arc welded straight seam steel tubes.
 Submerged arc welding process

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