Seamless Pipes and Tubes for Pressure Applications


Seamless high-temperature tubes and furnace tubes suitable for use in applications with temperatures above 500ºC (932ºF).

PIPES FOR PRESSURE APPLICATIONS OLD STANDARD
Execution Norm Steel grade
Welded DIN 1626 St.37.0
Welded DIN 1626 St.52.2
Seamless DIN 1629 St.37.0
Seamless DIN 1629 St.52.2
Seamless DIN 17175 St.35.8/1
Seamless ASTM A106* Grade B
Seamless ASTM A333* Grade 6
PIPES FOR PRESSURE APPLICATIONS NEW STANDARD
Execution Norm Steel grade
Welded DIN EN 10217-1 P235TR2
Welded DIN EN 10217-3 P355N
Seamless DIN EN 10216-1 P235TR2
Seamless DIN EN 10216-3 P355N
Seamless DIN EN 10216-2 P235GH
Seamless DIN EN 10216-2 P265GH
Seamless DIN EN 10216-4 P265NL

* ASTM standards will remain valid and will not be replaced by Euronorms in the near future

EN10216-1 / DIN1629 Standard specification

DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.

THE EN 10216 COMPRISES SEVERAL PARTS. THE PARTS THAT ARE RELEVANT TO US ARE AS FOLLOWS:

This part of EN10216 may also be applied for tubes of non-circular cross section; necessary modification should be agreed a time of enquiry and order.

Some examples:
EN 10216-1, QUALITY P235TR2 (FORMERLY DIN 1629, ST.37.0) EN 10216-2, QUALITY P235 GH (FORMERLY DIN 17175, ST.35.8 CL. 1, BOILER PIPE) EN 10216-3, QUALITY P355 N (MORE OR LESS EQUIVALENT TO DIN 1629, ST.52.0)

* Normalized is defined as: normalized (warm) rolled or standard annealing (at a min temperature of 930°C). This applies to allqualities designated by the letter ‘N’ in the new Euro Standards.

Pipes: the following standards are replaced by DIN EN

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Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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