Pipeline details
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Fig.L115The transition is welded concentric stainless -
Fig.L127/GOSTWelded stainless steel tee GOST
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Fig.L127/DINWelded stainless DIN tee
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Fig.L126/GOSTGOST welded stainless branch
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Fig.L126/DINWelded stainless steel DIN branch
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Fig.L121/GOSTWelded stainless steel plug GOST
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Fig.L121/DINDIN stainless steel welded plug
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Fig.M320Connection American stainless VZR
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Fig.M321The nipple is stainless
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Fig.M322Transitional stainless nipple
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Fig.M323American stainless steel VR coupling
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Fig.M324The futorka is stainless
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Fig.M325Plug stainless external thread
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Fig.M326Stopper stainless internal thread
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Fig.M327The lock nut is stainless
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Fig.N320The thread is short stainless
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Fig.N321The coupling is stainless
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Fig.N322The bend is stainless
What connecting parts are used for installing pipelines?
Each fitting performs a specific task:
- continues the straight section;
- changes direction;
- forms branches;
- closes the exit.
The connection method is chosen taking into account the pipe material and the need for disassembly. Welded products create a permanent joint, while threaded products allow compact assemblies to be assembled without welding.
When selecting pipeline parts for repair, check the actual dimensions of the existing network. The outer size, wall thickness, thread and installation length may differ. For replacement, markings of the old part, measurements and photos of the installation location are useful.
Couplings, nipples, tees, angles
The coupling connects the ends with the corresponding external thread. The nipple has an external thread for connecting elements with an internal thread. The tee forms a branch, and the angle changes the direction of the route. Transitional versions help to coordinate different diameters without unnecessary intermediate elements.
For water networks, fittings made of cast iron, steel and products made of other suitable materials are used. Their compatibility is assessed by operating pressure, temperature and composition of the medium. The material itself does not determine the permissible mode: the characteristics of a specific product are required.
Crosses, joints, flanges, locknuts
The cross forms several directions from one node. The bend with a long threaded part is used together with the corresponding parts to assemble the connection. The socket combines external and internal threads of different sizes. The lock nut fixes the position of the elements in the corresponding structure; the method of sealing is determined by the structure of the node.
Manufacturing materials: malleable iron, galvanized steel
Malleable iron is used for threaded fittings, and steel parts may have a protective zinc coating. Galvanization helps to reduce corrosion under appropriate conditions, but its compatibility with the environment and temperature is also checked. Cast iron and steel have different properties, so arbitrary substitution of the material is unacceptable.
The UKSPAR catalog also includes stainless steel connecting parts: couplings, nipples, flanges and other elements. The specific metal grade, coating availability and availability of the required version are specified in the product card. For systems with requirements for environmental cleanliness, the suitability of all contact materials is checked.
Compliance with GOST and DSTU standards
When the specification provides for connecting parts according to GOST, the standard number and exact product parameters are required. The general inscription "GOST" is not enough to check compatibility. The dimensions, material, end design and supply documentation are checked. For items according to DSTU, the specific document designation is also indicated.
How to choose the right connecting part
Start with the assembly diagram and the medium parameters. For threaded installation, check: type, direction and size of thread; for welding, check material, diameter and wall thickness. Sealing materials must withstand the temperature and be compatible with the liquid or gas. The pipeline is fixed so that the joints do not take on excessive mechanical loads.
Before assembly, the pipeline parts are cleaned of dirt and checked for damage. After assembly, a tightness test is performed according to the procedure for this system. Leaks are not eliminated by uncontrolled increase in force: the geometry, seals and condition of the surfaces are checked.
Buy connecting parts according to GOST with delivery across Ukraine
Provide UKSPAR with a list of items with quantity, dimensions, materials and required standards. For non-standard strapping, attach a drawing or diagram. The manager will clarify available versions, product documents, cost and completeness of the order. Delivery across Ukraine is agreed taking into account the composition of the batch.