1 Scope
This code specifies the quality standards, contents, procedures of the acceptance of the inspection lot and sub-item projects as well as the requirements of the quality management and quality control on the construction site of the station procedure pipeline project.
This code is applicable to the acceptance of construction quality of procedure pipeline projects in the construction or renovation (extension) and renovation of the station yard and valve chest related to oil and gas long-distance pipelines and gathering and transportation pipelines.
This code is not applicable to the internal dehydration plant of oil and gas field, the construction quality acceptance of the pipelines that belong to in-station pumps, heating furnaces and other similar equipment bodies as well as instation high-temperature heat-transfer oil pipelines.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this code. For dated references, subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this code are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document referred to applies.
GB 150 "Steel Pressure Vessels"
GB/T 9445 "Non-destructive Testing- Qualification and Certification of Personnel"
GB 50235 "Code for Construction and Acceptance of Industrial Metallic Piping"
SY/T 0063 "Standard Test Methods for Holiday Detection in Pipeline Coatings"
SY/T 4103 "Welding and Acceptance for Steel Pipings and Pipelines"
SY/T 4109 "Nondestructive Testing of Oil and Gas Steel Pipeline"
SY 4200 "Code for Quality Acceptance of Oil and Gas Construction Engineering-General rule"
JB/T 450 "Technical conditions of PN 16.0~32.0MPa Forged Angle High Pressure Valves, Pipe Fittings and Fastening Pieces"
3 Terms and Definitions
For the purpose of this code, the following terms and definitions apply.
3.1
Piping
The fabrication assembly composed of piping components and used for transporting, distributing, mixing, separating, discharging, metering, controlling or preventing the fluid flow.
3.2
Piping components
The elements used for connecting or assembling pipelines, including the pipes, pipe fittings, pipe-supporting elements, fixtures, flanges, gaskets, fastening pieces, valves as well as expansion joints, flexible joints, pressure hoses and separators.
3.3
Piping components
Tit is the generic term of the elbow, bent pipe, compensator, reducing pipe, tee joint, boss, insulating joint, pipe manifold and end socket.
3.4
Pipe-supporting elements
It is the generic term of the pipe pier, support and its relevant connecting piece use for supporting and fixing pipelines.
3.5
Fixtures
The elements transmitting the load from the pipe or structural attachments of the pipeline to the supporting structure or equipment, including the hanger rod, spring supports and hangers, diagonal draw bar, balance weight, turnbuckles, support bar, chain, guide rail, anchoring element and saddle.
3.6
Structural attachments
The parts attached on the pipe by adopting welding, bolted connection or clamping methods, including the piping lug, lifting (support) lug, circular ring, clamp, suspension clamp, anchorage splint and apron type pipe saddle.
3.7
100% radiographic test
The radiographic test on the full circumference of all circumferential butt welds and the radiographic test on the overall length of the longitudinal weld for a batch of designated pipelines.
3.8
Random radiographic test
The radiographic test on the full circumference of the circumferential butt weld of the pipeline according to a certain random inspection proportion in a batch of designated pipelines.
4 General Rules
4.1 This code is formulated according to the requirements of relevant current laws and regulations as well as management standards of the project quality and relevant technical standards of the Nation and petroleum natural gas profession.
4.2 The requirements of the construction quality acceptance of the station procedure pipeline stated in the contract agreement document, design documents, and other engineering technology documents adopted under construction shall not be less than the requirements of this code.
4.3 This code shall be applied with SY 4200.
4.4 The specification for the construction quality acceptance of the station procedure pipeline project shall not only implement this code, but also shall meet the requirements of the current relevant mandatory standards of the Nation.
Foreword II
1 Scope
2 Normative References
3 Terms and Definitions
4 General Rules
5 Basic Requirements
5.1 General Requirements
5.2 Inspection of piping components
6 Steel Pipe Blanking and Piping Components Processing
6.1 General Requirements
6.2 Dominant Items
6.3 General Items
6.4 Quality Acceptance Record
7 Piping Installation
7.1 General Requirements
7.2 Dominant Items
7.3 General Items
7.4 Quality Acceptance Record
8 Piping Assembly and Welding
8.1 General Requirements
8.2 Piping Assembly
8.3 Piping Welding
9 Pipe Ditch Excavation, Ditching and Back Filling
9.1 Pipe Ditch Excavation
9.2 Pipeline Ditching and Pipe Ditch Backfilling
10 Purging and Pressure Testing for Piping System
10.1 General Requirements
10.2 Dominant Items
10.3 General Items
10.4 Quality Acceptance Record
11 Piping Anti-corrosion and Thermal Insulation
11.1 General Requirements
11.2 Piping Anti-corrosion
11.3 Piping Insulation
12 Handing Over and Acceptance of Project
Appendix A (Normative) Appliance Used for Project Quality Inspection
Appendix B (Normative) Record Table of Examination of Quality Control Information on Station Procedure Pipeline Project
Appendix C (Normative) Table of Quality Acceptance Record for Inspection Lot
Appendix D (Normative) Groove Type and Assembly Dimension of Pipe End
