Welded galvanized pipes for pressure installations EN10255 and EN10217-1

Green Stal is direct importer

Welded galvanized pipes for pressure installations EN10255 and EN10217-1

GREEN STAL has permanently at the Bucharest Warehouse 10,000-15,000 tons of longitudinally welded steel pipes (black and galvanized) compatible with the distribution of liquids under pressure at room temperature.

The galvanized welded steel pipes for installations that we have at the Bucharest Warehouse are produced according to European standards EN10255 (medium and light series) and EN10217/1.

The galvanized pipes sold by GREEN STAL do not have a sanitary approval for drinking water.

About galvanizing
The galvanizing of welded pipes is performed in accordance with EN10240. The galvanizing method is ‘hot dip galvanizing’ – i.e. the steel pipes are immersed in a bath of molten zinc. Basically, hot-dip galvanizing takes place. ALL GALVANIZED PIPES SOLD BY GREEN STAL ARE HOT-DIP GALVANIZED ONLY (we do not sell cold dip galvanized pipes, except on customer’s request). The zinc coating must be uniform both inside and outside the pipes.

Production standards – distribution of liquids under pressure at room temperature
EN10255 and EN10217-1

EN10255 S195T Steel pipes, welded, for pressure purposes. Non-alloy steel pipes for welding and threading. Intended uses: distribution of aqueous liquids and gases

The EN10255 compatible steel is S195T.
This steel is classified as non-alloy quality steel according to EN 10020.

EN10217-1 P235TR1 Welded steel pipes for pressure purposes. Pipes of non-alloy steel, welded electrically by pressure in line and by flux-cored arc welding with specified characteristics at room temperature. Distribution of aqueous liquids.

Steels compatible with EN10217-1 are listed in the tables below:

Chemical composition (casting analysis) in % by mass

Mechanical properties

Up to the external diameter of 165.1 mm the pipes are produced according to the standard EN10255 (usual walls), after this diameter starting with 168.3mm the pipes are produced according to the standard EN10217/1.

Also, very thin pipes are produced according to EN10217-1 (so, we can have very thin pipes in the range 21.3-323.9, which are not produced according to EN10255, but are produced according to EN10217-1).

Please view the attached section of the website – PRODUCTS ACTS

Purpose and range of applications for galvanized pipes
EN10255 – Distribution of aqueous liquids under pressure at room temperature.
EN10217-1 – Distribution of aqueous liquids at room temperature.
Various metallic confections requiring a high degree of rust safety.

Pipe dimensions (see link)

  • Outer diameter: 21.3mm-323.9mm;
  • Wall thickness: 2.00-12.7mm;
  • Bar length: usually 6.00mm (+/-50mm);

Pipe durability: depending on temperature, pressure and fluids used – this decision will be made by the engineer. Obviously, the wall thickness and the environment where the pipe is installed play a key role.

Pipe finishes (pipe ends)

  • Flat heads (chamfered or straight cut);
  • Plug and threaded ends;
  • Grooved ends (prefabricated in the factory or at the Green Stal Warehouse) compatible for use with 100tong, Victaulic, Tyco etc. quick couplings.

Quality certificates
All pipes delivered by Green Stal are accompanied by a Quality Certificate (MTC-MILL TEST CERTIFICATE) issued by the manufacturer and a Declaration of Conformity issued by Green Stal;

Galvanizing standard – EN10240

Leak tightness for pipes produced according to EN10255
All pipes shall be leak tight. Leak tightness shall be demonstrated by hydrostatic test or electromagnetic test. At the choice of the manufacturer, the test may be either a hydrostatic test at minimum 50bar for at least 5s, with no obvious leakage, or an electromagnetic test according to EN10246-1.

Leak tightness for pipes produced according to EN10217-1
All pipes shall be leak tight. Leak tightness shall be demonstrated by hydrostatic testing or electromagnetic testing. The test can be either a hydrostatic test or an electromagnetic test according to EN ISO 10893-1.

Handling and storage techniques at construction sites / warehouses
Black pipes must be handled with great care (only with forklifts that can handle heavy weights, cranes, etc.), as they are very heavy and any mishandling can cause serious personal injury. Also, if strong blows are applied to the pipes, if a bar falls from a distance of more than 1 meter, if a pipe tie falls from heights greater than 20cm on one of the bars located on the hexagonal edges of the tie, the pipe may lose its mechanical properties and especially leaks may occur on the weld of the pipe.

Black pipes should not be stored in damp environments, in environments with basic or acidic substances, mortar, cement water, cement, lime, etc.

Black and galvanized pipes should not be in direct contact with the ground, also in damp, sandy, concrete, cement, marble etc. environments the pipes should be covered with a polyethylene tarpaulin.