Your Address : Globalchemmade--TianYi Piping Co.Ltd
Name:TianYi Piping Co.Ltd
Type:Others
Tel:86-0317-6393767
Fax:86-0317-6391959
Email:cztianyi@yahoo.cn
Address:China(Mainland)
Equipments detail
| Equipment: | Seamless Steel Pipe |  |
| Equipment Type: | Auxiliary Equipment -> Pipe Fitting | |
| Unit Type: | ||
| Technical Parameters: | ||
| Post Time: | 2010-09-14 | |
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| Usage: | ||
| Description: | Easy to produce high-quality seamless steel pipe surface scarring. The reasons are: 1. Uneven quality seamless steel pipe material, impurities. 2. Inferior material manufacturers guide and guard poorly equipped, easy to stick steel, these impurities after the roll bite is easy to produce scarring. 1. High-quality seamless steel pipe easily scratched because of inferior materials equipment is very easy to produce glitch, scratch the surface of thick-walled seamless steel pipe. Deep scratches reduce the strength of thick-walled seamless steel pipe. 2. High-quality seamless steel pipe without metallic luster, pale red color of pig iron or similar, reasons 2.2, it is adobe blank. 2, inferior materials rolling temperature of non-standard, their steel temperature is through the visual, so the region can not be carried out in accordance with the provisions of the austenitic rolling, the performance of thick-walled seamless steel pipe can not be naturally compliance. 3. High-quality seamless steel tube cross bars thin and low, often full of dissatisfaction, because the big manufacturers to achieve a negative tolerance, finished the previous Road to the high levels of reduction, iron-type small, hole filling dissatisfaction. 4. Leaving it high-quality seamless steel tube oval cross section, because the factory in order to save materials and finished products before the two rollers of the rolling reduction is too large, which greatly decrease the strength of rebar, and does not meet the standard dimensions rebar . 5. High-quality seamless steel pipe material containing impurities, the density of steel is low, and the size tolerance serious, so in the absence of a vernier caliper of the case, you can check it for weighing. For example, rebar 20, the national standard requirement of 5% maximum negative tolerance, Length 9M single theory when it weighs 120 kilograms, its minimum weight should be: 120 X (l-5%) = 114 公斤, weighing out the actual weight of a single smaller than 114 kg, it is high-quality seamless steel pipe, because it held more than 5% tolerance. Generally speaking, the volume of the entire match will be better, mainly taking into account the accumulated error and the probability of the problem. 6. High-quality seamless steel tube internal diameter fluctuations, due to; (1), yin and yang of steel surface temperature instability. (2), steel composition uneven. (3), due to poorly equipped, low intensity ground, rolling the big bounce. There appears larger diameter change of the same week, so easy to produce uniform steel Shouli Bu fracture. | |