A steel pipe (also called a hollow profile) is a tube with circular, square, oval or other cross section, whose wall is made of steel. Steel pipes are serve to carry liquid, gaseous or solid substances, or are used as static or constructive (building) elements.By the way, fire-welded pipes were manufactured for the first time in 1825, in Great Britain. Germany followed in 1845. The Mannesmann brothers developed in 1886 the cross-rolling process for the manufacture of seamless pipes. In 1889, the press-pull method according to Ehrhardt was then introduced.Steel pipes are thereby differentiated according to the following production processes:
Seamless steel pipes
These are produced through the perforation of solid material (blooms, billets, slabs etc.) and subsequent machining steps.
Longitudinally welded steel pipes
These are made of steel strips (steel strip), broad strip (coils), steel plates etc. formed by first bending the pipe body and the strip edges are then welded together in the longitudinal direction to form a closed steel pipe.
Spirally welded steel pipes
These are made of steel strips helically wound and formed and accordingly helical-welded at the strip edges to form a closed pipe body.Steel pipes are standardised according to European standards based on the production system and are valid in Germany as DIN-standards.
Overview of the European or else German standards in the steel pipes segment
Pipes welded made of unalloyed steels without special requirements
Pipes welded made of unalloyed steels for special requirements
Pipes welded made of unalloyed steels without particularly high requirements
EN 10216 (DIN 1629)
Pipes seamless round made of C-steel for special requirements
Pipes seamless round made of C-steel for particularly high requirements
EN 10305-1 (DIN 2391)
Precision steel pipes seamless with particular dimensional precision
EN 10305-4 (DIN 2391)
Hydraulic cable ducts seamless with particular dimensional precision
EN 10305-2 (DIN 2393)
Precision steel pipes welded, cold drawn, with higher level of precision
Steel pipes. Calculation of wall thickness against internal pressure
EN 10255-M (DIN 2440)
Steel pipes. Pipes thread cut medium heavy execution
EN 10255-H (DIN 2441)
Steel pipes. Pipes thread cut heavy execution (steam pipes)
Threaded pipes with quality specification. Nominal pressure 1 to 100
EN 10240 (DIN 2444)
Zinc coatings made of steel pipes. Quality standard for hot-dip galvanising of steel pipes
DIN 2445 Teil 1
Seamless steel pipes for dynamic loads. Hot formed pipes, nominal pressures 100 to 400
DIN 2442 Teil 2
Seamless steel pipes for dynamic loads. Precision steel pipes, nominal pressures 64 to 400
EN 10210 (DIN 2448)
Steel pipes seamless
EN 10219 (DIN 2458)
Welded steel pipes
Pipes welded made of construction steels simple quality
Pipes round seamless made of steel for general purposes in steel constructions
Steel pipes for the transport of flammable liquids and gas
Steel pipes seamless for low temperatures
Pipes seamless made of fine grained construction steels
EN 10216-2 (DIN 17175)
Pressure boiler pipes seamless made of resistant to annealing steels
EN 10217-2 (DIN 17177)
Pressure boiler pipes welded
Pipes round welded made of fine grained construction steels for special applications
Pipes round seamless made of fine grained construction steels for special applications
The American National Standards Institute, abbreviation ANSI manages and coordinates the standardisation system for the private sector in the U.S. This is a non-profit organization that is supported by various private and public organisations.The ANSI itself does not develop standards, but instead facilitates their development by establishing consensus among qualified groups. ANSI also ensures that guiding principles such as consensual ability, expediency and openness are observed by the affected groups. These standards are then categorised either as application standards or as design standards.
The American Petroleum Institute (abbreviation API) is the largest advocacy group in the oil and gas industry in the U.S., which moreover also extends to cover the petrochemical industry. The technical guidelines issued by the API are comparably comprehensive and exacting. The guidelines are not developed by independent bodies, but instead drawn up by professionals from industry companies that work together in the advocacy group
Learn more about DIN standards, the different API specifications or the difference between seamless and welded steel pipes.
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