Optional copper stranded wire can be seen from the appearance, specifications, structure, welding process. . . Observe the quality of the product
Appearance
Generally good copper strands have a brighter appearance, no obvious damage and scratches, and no obvious discoloration caused by oxidation reaction. The outer color is relatively uniform, there is no black spot, no cracks, and the distance is even and regular. Meeting the above criteria is a good choice for copper strands.
2. Specifications
The selection of copper strands requires the scale and specifications of the observation line. Generally, the wire drawing of the copper strands should be within the specified range and cannot exceed the process standard. Otherwise, it is regarded as an invalid strand. The single wire that forms the stranded wire must meet the uniform and tidy characteristics and conform to the process rules.
3. Structure
Look at the copper stranded wire structure to form the copper stranded wire. Also observe the distribution and composition of the stranded wire to see if there are short-term, missing wires, loose strands, and the phenomenon of stocking. Generally, these can be observed by the naked eye. We need to carefully observe the quality of the copper strands. We cannot choose unqualified products for the production of wires and cables, which can cause serious safety accidents.
4. Welding process
The purchase of copper stranded wire should also pay attention to whether the welding process is firm, whether the welded interface part is neat, and there is no unevenness of the line. The welded interface should be neat, flattened, rounded, and cannot be tied. The diameter of the welding head should not exceed 0.2 mm. The welding of two adjacent copper strands should be kept at a certain distance and the spacing should be uniform.
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A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate for covering or closing the end of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.
Although the word flange generally refers to the actual raised rim or lip of a fitting, many flanged plumbing fittings are themselves known as 'flanges':
There are many different flange standards to be found worldwide. To allow easy functionality and interchangeability, these are designed to have standardised dimensions. Common world standards include ASA/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped publishing B16.5 in 1996, and the standard is ASME B16.5
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