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Spiral pipe thread identification method
Sources: this site Click: Date: 2016-5-16 18:50:36
Spiral pipe thread identification method
Spiral pipe thread to identify the most effective way is to use a joint foot, this foot is a specialized mark outer diameter and female thread root expansion tapered bore diameter caliper, easy to use, intuitive, and accurate. You can also directly use the long leg calipers combine steel ruler to measure the external thread root diameter, length, thread expanding cone threaded aperture control specification query. Due to defects in the weld parallel, so the spiral steel pipe, its weld defects; oblique defects. During use, the main stress direction of the steel pipe, the equivalent defect length of the pipe axis direction than straight seam pipe small; secondly, because the pipeline are rolled steel plate, impact toughness greater anisotropy, along the rolling direction CVN impact values than perpendicular to the rolling direction CVN value three times higher. Straight seam pipe suffered precisely perpendicular to the principal stress pipe impact resistance the lowest direction, and then stagger the spiral steel pipe impact resistance the lowest direction, the spiral steel pipe weld length disadvantages into advantages.
Spiral steel pipe weld seam than a straight pipe length, such as pipe length L, the weld length L / cos. It has long been debated spiral pipe straight seam pipe, especially when compared to the superior who issues UOE steel pipe. Spiral steel pipe manufacturing technology development today, we should be fully and correctly evaluate and compare, the idea of a long spiral pipe weld problems. Pipe spiral steel pipe for the outer diameter is represented by the letter D followed by additional outer diameter size and wall thickness, for example, an outer diameter of 108 seamless steel pipe wall thickness 5MM, with D108 * 5 indicates, plastic tubes also outer diameter expressed, such as De63, others such as reinforced concrete pipe, cast iron pipe, galvanized pipe, etc. using DN said that in the design drawings generally used in the nominal diameter is expressed, the nominal diameter is to design and manufacture and maintenance convenience artificially provisions a standard, but also more nominal diameter, the pipe (or pipe) the specification name.
Spiral steel pipe weld seam than a straight pipe length, such as pipe length L, the weld length L / cos. It has long been debated spiral pipe straight seam pipe, especially when compared to the superior who issues UOE steel pipe. Spiral steel pipe manufacturing technology development today, we should be fully and correctly evaluate and compare, the idea of a long spiral pipe weld problems. Pipe spiral steel pipe for the outer diameter is represented by the letter D followed by additional outer diameter size and wall thickness, for example, an outer diameter of 108 seamless steel pipe wall thickness 5MM, with D108 * 5 indicates, plastic tubes also outer diameter expressed, such as De63, others such as reinforced concrete pipe, cast iron pipe, galvanized pipe, etc. using DN said that in the design drawings generally used in the nominal diameter is expressed, the nominal diameter is to design and manufacture and maintenance convenience artificially provisions a standard, but also more nominal diameter, the pipe (or pipe) the specification name.
