The hydraulic pressure Jumper Connector hardware is a kind of conductor jumper wire connector between two tube busbars in power transmission facility. The clamp body is aluminium,the other parts are hot-dip galvanized steel.
The Splicing Fitting is primarily used to join kinds of bare conductors and lightning conductors. It bears the same electirc load as conductors. Most splicing fitting bear all the tension of conductors, ground wires and lightning conductors. According to the tensile condition, splicing fittings include force-bearing type and non-force-bearing type. Splicing fittings are generally divided into compression type and preformed type. And the compression type includes hydraulic compression, explosive compression and compression with pliers.
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1. The production methods can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes and the like according to different production methods.
1.1. Hot-rolled seamless pipes are generally produced on automatic pipe mills. The solid billet is inspected and the surface defects are removed, cut to the desired length, centered on the perforated end face of the billet, and sent to a heating furnace for perforation in the perforator. At the same time as the perforation rotates and advances continuously, under the action of the roller and the head, the cavity inside the hollow tube gradually forms a cavity, which is called a capillary tube. It is sent to the automatic tube mill for further rolling. Finally, the entire machine is evenly wall thicknessed and sizing by the sizing machine to meet the specifications. The use of continuous rolling mills to produce hot-rolled seamless steel tubes is a more advanced method.
1.2. If you want to obtain a seamless tube with smaller size and better quality, you must use cold rolling, cold drawing or a combination of both. Cold rolling is usually carried out on a two-high mill, and the steel tube is rolled in a ring-shaped pass composed of a variable-section circular hole groove and a stationary conical head. Cold drawing is usually performed on a single-chain or double-chain cold-drawing machine of 0.5 to 100T.
1.3. The extrusion method is to place the heated tube blank in a closed extrusion cylinder. The perforation rod moves together with the extrusion rod to squeeze the extrusion from the smaller die hole. This method produces smaller diameter steel tubes.
2, use
2.1, seamless use is very wide. General purpose seamless pipes are rolled by ordinary carbon structural steels, low alloy structural steels or alloy structural steels with the highest yield, and are mainly used as pipes or structural parts for conveying fluids.
2.2, according to the use of different types of three types of supply: a, according to chemical composition and mechanical properties of the supply; b, according to the mechanical performance of the supply; c, according to water pressure test supply. Pipes supplied by Types a and b, if used to withstand liquid pressure, are also subject to hydrostatic testing.
2.3. Special-purpose seamless pipes include seamless pipes for boilers, seamless pipes for geological use, and seamless pipes for petroleum.
3, types
3.1, seamless steel pipes can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes, etc. according to different production methods.
3.2. According to the appearance classification, there are round tubes and shaped tubes. In addition to square tubes and rectangular tubes, special-shaped tubes include elliptical tubes, semicircular tubes, triangular tubes, hexagonal tubes, convex tubes, and quincunx tubes.
3.3 According to the different materials, it can be divided into ordinary carbon structural tubes, low alloy structural tubes, high-quality carbon structural tubes, alloy structural tubes, and stainless steel tubes.
3.4. According to the specific purpose, there are boiler tubes, geological tubes, oil tubes, etc.
4, specifications and appearance of the quality of seamless pipe according to GB/T8162-87 regulations
4.1 Specifications: The outer diameter of hot rolled pipe is 32-630mm. Wall thickness 2.5 to 75mm. Cold-rolled (cold drawing) tube outer diameter 5 ~ 200mm. Wall thickness 2.5 to 12mm.
4.2 Appearance quality: There must be no cracks, folds, folds, separations, hairline and scarring defects on the inner and outer surfaces of the Steel Pipe. These defects should be completely removed, and the wall thickness and outer diameter must not be allowed to exceed the negative deviation after removal.
4.3. Both ends of the pipe should be cut at right angles and the burrs removed. Pipes with a wall thickness greater than 20 mm allow gas cutting and hot saw cutting. The agreement between supply and demand sides can also be undone.
4.4, cold drawn or cold rolled precision seamless steel tube "surface quality" with reference to GB3639-83.
5, chemical composition test
5.1. The domestically produced seamless pipes supplied according to chemical composition and mechanical properties, such as the chemical compositions of the steels Nos. 10, 15, 20, 25, 30, 35, 40, 45 and 50, shall comply with the provisions of GB/T 699-88. Imported seamless pipes are inspected according to the relevant standards stipulated in the contract. The chemical composition of 09MnV, 16Mn, 15MnV steel should meet the requirements of GB 1591-79.
5.2, specific analysis method Refer to GB223-84 "Steel and alloy chemical analysis method" of the relevant part.
5.3, analysis deviation Refer to GB222-84 "Steel chemical analysis of chemical composition and the allowable deviation of chemical composition of finished products."
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51 steel pipe network news: how to produce seamless steel pipe
Seamless steel tubes are rolled after they have been perforated with solid billets.