Threaded pipe

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A threaded pipe is a pipe with a rolled or cut pipe thread .

Installation technology

In the gas and water installation technology as threaded pipes tubes designated have an outer diameter which is composed of the traditionally used to connect tubes used Whitworth pipe threads but neither gives the metric yet to inch fits measurement system.

These threaded pipes, which are still widely used, are standardized in DIN EN 10255 (edition 11.2004), which defines a medium row (M) and a heavy row (H) .

Before that, the norms existed

  • DIN 2439 · Edition 5.1961 for threaded pipes , light . These pipes are rarely used today.
  • DIN 2440 · Issue 6.1978 for steel pipes , concrete Moderate threaded pipes , in precursor standards as mild steel pipes and ordinary threaded pipes (gas pipes) were referred
  • DIN 2441 · Edition 6.1978 for steel pipes , specifically heavy threaded pipes

Threaded pipes according to these standards are offered in seamless or welded design. The latter can usually be recognized by a fine, longitudinal stripe that marks the point at which the sheet was rolled up and welded during manufacture.

Up to now, galvanized pipes have often been used for water installations. Since these tend to build up, they are largely replaced by plastic and stainless steel pipes in areas with increased water hardness .

The raw steel pipes, known as black pipes , are used for heating installations because the zinc layer dissolves in heating systems and settles as sludge.

Pipes with larger diameters are usually welded or connected by flange connections. Boiler pipes are also used for this purpose .