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How to classify the fastener by its connection


The connection way of stainless steel pipe fitting, according to its principle is different, its applicable scope is also the connection way classification of stainless steel hydraulic joint is different, but most are easy to install, firm and reliable.

The sealing ring or gasket used for connection is mostly made of silicone rubber, nitrile rubber and ethylene propylene diene rubber, which meet the requirements of the national standard.

The common connection mode of the straight through transition joint of stainless steel pipe fitting is divided into compression, compression, movable connection, push, screw thread, socket welding, movable connection, welding and the derivative connection mode of welding and traditional connection. 

Stainless steel pipe fittings used in stability in various industries, it includes: stainless steel elbow, stainless steel tee, heilongjiang standard quick twist joint stainless steel four-way, reducer, stainless steel, stainless steel tube caps, according to join method can be divided into the socket type, thread, flange, stainless steel pipe fittings and so on, its processing technology mainly includes the geometry size, welding quality, surface quality and mechanical properties, packaging requirements, etc.

The geometrical dimensions include outer diameter, inner diameter and wall thickness.It is also required to control the radius of curvature.For example, if the radius length is 1.5D, the radius of curvature must be within the required tolerance.

Most of the stainless steel pipe used for welding, in order to improve the quality of welding, the end of the car into the groove, leaving a certain Angle, with a certain edge, this requirement is also more strict, side more thick, custom hexagonal plug Angle for how much and deviation range are stipulated, geometric size than the pipe more than a lot of items.The surface quality and mechanical properties of stainless steel pipe fittings are basically the same as those of pipes.The type of steel is the same as that of the connected pipe for easy welding.

Stainless steel pipe fittings have to go through surface treatment, the inner and outer surface of the oxide sheet through shot peening treatment spray off, wenzhou non-standard nylon tube coated with anti-corrosion paint.This is necessary for export and, moreover, for the convenience of transportation and prevention of rust and oxidation at home.

Requirements for packaging for small stainless steel pipe fittings, such as export, you need to make wooden case, about 1 cubic meter, the number of elbow in this box should not exceed about one ton, the standard allows custom bent through pipe joint set, that is, large set small, but the total weight should not exceed 1 ton generally.For large items, individual packaging is required, and for items like 24 ", individual packaging is required.It is packaging mark additionally, mark is to indicate dimension, steel number, batch number, manufacturer trademark.Steel seal should be printed on the pipe fittings, and attached with packing list, warranty and other documents.

Stainless steel pipe fittings are divided into wire mouth pipe fittings and welding pipe fittings, according to the material can be divided into 304,321,310 and so on, production standards are divided into international standards, American standards, German standards and so on.

Made of stainless steel pipe, including stainless steel elbow, stainless steel tee, stainless steel four, stainless steel reducing pipe, stainless steel pipe cap.Next by teng hai for you to introduce the stainless steel pipe processing and transportation related issues.

1. The back welding method is adopted for the arc starting of stainless steel pipe fittings with multiple multi-layer welding, and the arc closing should fill the arc pit.It is forbidden to arc or start arc on the surface of the base material of pipes and fittings.The defects such as air hole, crack, etc. should be cleaned when striking arc or starting arc.

2. When positioning welding, the inner side of the weld should be protected with argon.

3. The pipe cutting of stainless steel pipe fittings cannot be cut by ordinary grinding wheel, but should be cut by special grinding wheel or plasma.

4. After welding, the pipe fittings should be pickled and passivated.

5. When the material is hoisted, it shall not be in direct contact with other metals. It shall be padded with non-metallic materials such as wood boards or rubber boards.


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