This paper expounds how to supervise the production of the welding pipe for oil and gas transmission systematically, comprehensively, scientifically and efficiently from a few aspects such as the organization of supervision, the improvement of supervisors' quality, the focus of supervision, the summary and report of supervision and so on.

The supervision of steel structure construction of caihong and Furong great bridges in Shenzhen;

4 platform,the paper describes the quality control methods and the supervision outlines in the key section s steel construction of the self-elevating offshore platform.

In this article we introduce the type and art of HRSG briefly,study out the supervision mode,procedure,item,contents and quality demands on the experience of the normal boilers with coal fuel.

The paper expounds the importance and the necessity to proceed the manufacture supervision and acceptance for import bidding equipments, as well as the contents and the methods of the manufacture supervision and acceptance.

The paper summarized the major link in supervising the manufacture of large power transformer, and contract of supervising the manufacture,as well as the right of knowing the facts clearly and payment veto in agreement of supervising the manufacture.

References are provided for improving supervision on manufacture of equipment of hydropower station and enhancing quality o.

Based on the incentive theory and economic analysis of law in economics, studied is the mill supervision system for oil and gas pipeline, and discussed are its necessity and rationality.

Pipe mill supervision is a potent measure to ensure the pipe quality.

In light of the recent ten years'experience in OCTG mill supervision carried out by the Tubular Goods Research Center of CNPC, the importance of OCTG mill supervision is discussed and its practical experience is summarized.