GB/T 27699-2011 in English

《GB/T 27699-2011钢质管道内检测技术规范》由TC262（全国锅炉压力容器标准化技术委员会）归口，TC262SC3（全国锅炉压力容器标准化技术委员会压力管道分会）执行，主管部门为国家标准化管理委员会。

This standard specifies technical requirements for geometry inspection and metal-loss inspection of steel pipeline as well as inspection period, application scope of detector, inspection preparation, inspection procedure control, inspection report contents and acceptance methods.
This standard is applicable to overland steel pipeline in-line inspection with transmission medium of gas and liquid; seabed steel pipeline in-line inspection with transmission medium of gas and liquid may be carried out by reference to this standard.

1 Scope 1
2 Normative References 1
3 Terms and Definitions 1
4 General Requirements of Inspected Pipeline 3
5 In-line Inspection Period and Equipment Selection 4
6 Inspection and Construction Preparation 5
7 Pigging before Inspection 6
8 Commissioning of Geometric Deformation Detector 7
9 Commissioning of Dnmmy Tool 7
10 Commissioning of Metal-loss Detector 7
11 Inspection Data Preprocessing 8
12 Inspection Report 8
13 Verification of Inspection Results 11
14 Occupational Health, Safety and Environment 12
15 Delivery Information 12
Appendix A (Informative) Arrangement Requirements for Barrier Strip of Pipeline Three-way 14
Appendix B (Informative) Selection of In-line Inspection Equipment 15
Appendix C (Normative) List of Pipeline Survey 17
Appendix D (Normative) Operation Procedure for Launching and Receiving Detectors 23
Appendix E (Informative) Type and Definition of Metal-loss Features 25