Wuzhou spiral steel pipe manufacturer wholesale integrity-based

规格：

219-3500mm

规格：

6-28

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Our company actively implements total quality management in accordance with - and American Petroleum Institute
# standards and established a quality system from the general manager to the heads of each department to each production Workers are all involved in the quality assurance system. The management responsibilities, quality system, procurement process, control, inspection and testing are strictly controlled and clearly defined in the company's quality manual, so that every quality activity is carried out in accordance with the prescribed procedures. Each job position is carried out according to the established work standards. In quality management, the principle of focusing on prevention and combining inspection and control is adopted, that is, paying attention to and taking preventive measures to avoid the occurrence of problems, and not neglecting to respond promptly to problems once they occur. To correct this, the company has organized and planned arrangements for the training of personnel at all levels. Personnel involved in various quality activities are assigned to work according to their education, training and assessment status, and are issued qualification certificates with certificates. Our company has passed the quality inspection. The tracking and control of a subpoena for steel pipes makes the inspection records of the entire production process highly traceable. . Spiral steel pipe deviation: During the production process, because the actual size is difficult to meet the nominal size requirements, that is, it is often larger or smaller than the nominal size, the standard stipulates that a difference between the actual size and the nominal size is allowed. A positive difference is called a positive deviation and a negative difference is called a negative deviation.
Tolerance of spiral steel pipe: The sum of the absolute values of the positive and negative deviation values stipulated in the standard is called the tolerance and is also called the tolerance zone.
Deviation is directional, that is, expressing tolerance as positive or negative has no direction. Therefore, it is wrong to call the deviation value positive tolerance or negative tolerance. We strive for survival by quality and development by science and technology. We welcome new and old customers to our factory to discuss business. Yu Xin
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