Build Daily

Engineering Systems

August 12, 2017 18:08

Fittings for steel pipes and piping

The choice of metal pipes, their advantages and disadvantages

324 kinds of fittings 1

Through advanced technologies, including in the sheet metal industry, expanding the assortment of products almost do not suffer corrosion.Basically it is galvanized, which in tandem with a high-grade steel in such products imparts strength and durability.

Besides rolled steel coated with zinc, has a whole series of indisputable advantages:

  • anticorrosion;
  • Portability high temperatures up to + 200 degrees, unlike plastic that can withstand only 100;
  • resistance to mechanical damage;
  • Possibility of disassembly and re-assembly, without too much effort;

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At the same time, it is impossible not to mention the shortcomings of such pipes, as required in the selection of components, it is necessary to take into account all aspects.The characteristic surface roughness of the inner steel structure contributes to the formation of plaque, which leads to the diametrical narrowing and formation of leaks, which can be avoided by applying weld steel elements.Basically, it is typical for pipelines in cold water.In addition, under the influence of constant humidity may rust.

With regard to the installation of metallic systems, here they obviously lose the plastic, since heavier weight and thus complicate the assembly process.

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fittings Types: crimping, iron, threaded.

Ways steel pipes there are two: welding (one-piece) and threaded joint (split).

If fasteners classified by type, they are:

  • corners and bends.They are used to change the direction of the pipeline up to 120 degrees;
  • Tees and manifolds.Is connected to the backbone of communication in one branch;
  • Crossings.Do from one layout into two streams;
  • adapters of various modifications interconnected different networks;
  • clutch connects the pipe without bends from the same material;
  • caps and plugs.Clog design end;
  • Fittings connect the pipe with a flexible hose.

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connection between a metal pipe and fittings ready-made threads.Otherwise, it is cut by hand or die stock on a lathe.

Fittings are manufactured from various materials such as stainless steel, copper, brass, iron or chromium.The most accessible and popular are the steel fittings.

Another method of separation fittings - by type of connection to the pipeline:

  • welded;
  • Flange;
  • Crimp;
  • threaded.

Welded

consists of a portion of the pipe made using the welding equipment.

Flange

They are used for joining pipes with a diameter greater than 50 mm.The material is used for the manufacture of steel or cast iron.The process of installation is to weld the flange to the end of the pipe and then bolted.

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Crimp

is a versatile metal fittings galvanized.Suitable for multiple use, and allow you to deviate from the predetermined direction by a few degrees, in any direction.Allow to join steel pipes without welding and tapping at the same time perfectly sealed.A special kind of fittings for water, gas and heating are systems Gebo, which means the clamping mechanism provides integrity and accuracy of the attachment.

Threaded

is widely used thanks to the reliability and long service life.They are used mainly for heating systems and water supply.To ensure proper sealing threaded joints used linen, which is dipped into the paint, and are wound on the pipe.Threaded elements are used on pipes with diameter up to 50 mm.