The Delingha small diameter seamless steel pipe | the thick-walled seamless steel pipe | Delingha, the Cangzhou City Dongtai Steel Pipe Co., Ltd., sales manager at Zhiqiang: 13393378282 15932715956 0317-6289066 North China specializing in the production and sale of steel pipes and pipe fittings of one of the large enterprises, Yanshan County, Hebei Province Industrial Park is located in the pipeline equipment production base. East of Huanghua Port, north of Beijing, Tianjin, State Road 205, State Road 104, Beijing-Shanghai Railway cross transit, domestic transportation is very convenient; addition is only 200 kilometers away from Tianjin Xingang, to provide a more convenient conditions for the export business. The company covers an area of ??130 acres, 270 million yuan in fixed assets, the company has advanced production equipment and complete detection means. Now has eddy current flaw detector, ultrasonic flaw detector, nondestructive testing equipment, as well as hydrostatic testing machine WE-600 universal testing machine, WE-1000A hydraulic universal testing machine, as well as a full set of metallographic test equipment and physical chemistry instruments. The company has strong technical expertise, service capabilities and market competitiveness. The right to import and export company in 2008, based on the domestic market and exported to Europe, America and Southeast Asia, Africa and other places, and to establish long-term strategic partnership of cooperation with internationally renowned enterprises, praised by customers. The company adhere to the "integrity of management, quality marketing, and strive to win-win" concept of market operation, the right business ideas, the company has brought good economic returns, and laid a good foundation for network marketing. The main production process for hot rolled large diameter seamless steel pipe diameter seamless steel pipe and thermal expansion, thermal expansion of the largest seamless steel pipe specifications for 325mm-1220mm thickest 120mm, thermal expansion seamless steel pipe can produce a non-national standard size, thermal expansion without seam pipe is often said that the thermal expansion of the low density contraction strong steel pipe cross rolling method or drawing method to expand a shortage of pipe diameter pipe finishing process. To steel pipe thickening in a short period of time, can produce non-standard, special types of seamless pipe, and the low-cost, high production efficiency, is international trends tube rolling fields. GB5310 (high-pressure boiler seamless pipe) on the specified outside diameter greater than or equal to 76mm, and wall thickness ≥ 14mm steel pipe Charpy V-longitudinal impact test at 20 ℃; the average impact energy of the three samples should not Below 40J, to allow a sample of the impact energy is lower than average, but not less than 70% of the average. Seamless steel pipe outside diameter> 219.1mm, and wall thickness ≥ 25mm steel pipe instead of longitudinal mechanical testing available the lateral mechanical properties test. Charpy V-lateral impact test at 20 ℃, large diameter pipe to do the transverse mechanical testing convenient.