SY/T 7827-2024 Steel sleeve filled with epoxy resin or similar materialfor defect repairing of oil and gas pipeline English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 7827-2024
Steel sleeve filled with epoxy resin or similar material for defect repairing of oil and gas pipeline
油气管道缺陷修复用环氧钢套筒
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Structural Design of Epoxy Steel Sleeve
6 Steel Sleeve
6.1 Steel Plates
6.2 Bolt Connection Structure
6.3 Post-Forming Heat Treatment
6.4 Rust Prevention
7 Defect Filling Material
8 Gap Filling Material
9 Testing and Inspection
9.1 Inspection Frequency
9.2 Steel Sleeve
9.3 Defect Filling Material
9.4 Gap Filling Material
10 Marking, Quality Certification Documents, Packaging and Transportation
10.1 Marking
10.2 Quality Certification Documents
10.3 Packaging and Transportation
11 Installation and Use
11.1 Personnel Requirements
11.2 Environmental Requirements
11.3 Site Excavation
11.4 Removal of Original Anti-corrosion Coating
11.5 Defect Verification
11.6 Surface Preparation
11.7 Defect Filling
11.8 Installation of Steel Sleeve
11.9 End Sealing
11.10 Injection
11.11 Anti-corrosion and Backfilling
11.12 As-built Documentation
Appendix A (Informative) Defective Pipeline Information
Appendix B (Informative) Record Form for Information after Pipeline Repair
Epoxy Steel Sleeve for Defect Repair of Oil and Gas Pipelines
1 Scope
This document specifies the structural design, materials, testing and inspection, marking, quality certification documents, packaging and transportation, and installation and use of epoxy steel sleeves for defect repair of oil and gas pipelines.
This document applies to the manufacture, inspection, and use of epoxy steel sleeves for defect repair of onshore oil and gas transmission steel pipelines.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 150.3 Pressure vessels — Part 3: Design
GB/T 228.1 Metallic materials — Tensile testing — Part 1: Method of test at room temperature
GB/T 229 Metallic materials — Charpy pendulum impact test method
GB/T 2567 Test methods for properties of resin casting body
GB/T 4341.1 Metallic materials — Shore hardness test — Part 1: Test method
GB/T 5783 Hexagon head bolts — Full thread
GB/T 7124 Adhesives — Determination of tensile lap-shear strength of bonded assemblies (Rigid-to-rigid)
GB/T 8923.1-2011 Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings
GB/T 19466.2 Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition temperature
GB/T 24148.9 Plastics — Unsaturated polyester resins (UP-R) — Part 9: Determination of overall volume shrinkage
GB/T 35981 Metallurgical equipment — Welded lifting lug — Technical specification
NB/T 47013.3 Non-destructive testing of pressure equipments — Part 3: Ultrasonic testing
NB/T 47013.4 Non-destructive testing of pressure equipments — Part 4: Magnetic particle testing
NB/T 47013.5 Non-destructive testing of pressure equipments — Part 5: Penetrant testing
NB/T 47014 Welding procedure qualification for pressure equipment
SY/T 5918 Technical specification for rehabilitation of external anti-corrosion coating and insulation layer of buried steel pipeline
TSG Z6002 Examination rules for welding operators of special equipment
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
epoxy steel sleeve
A composite sleeve formed by a pair of semi-circular steel sleeves, slightly larger in diameter than the pipeline, installed over the pipeline defect, connected by bolts, and having the annular gap between the sleeve and the pipeline injected with epoxy resin or similar filling materials.
Note: The filling material creates a continuous load transition with the sleeve, allowing the sleeve and the pipe wall to share loads and deform cooperatively, thereby enhancing the pressure-bearing capacity of the defective pipe body.
3.2
hollowness
A void formed when the resin filling material does not completely fill the annular gap between the pipeline and the steel sleeve.
3.3
material for filling defect
The material used to fill external defects, such as metal loss and dents, flush with the external surface of the pipe body.
3.4
material for filling the gap
The material used to fill the annular gap between the steel sleeve and the pipeline.
4 General Requirements
4.1 Information required for the design of the epoxy steel sleeve shall include, but not be limited to:
a) Basic pipeline information: pipeline name, conveyed medium, material, diameter, wall thickness, specified minimum yield strength, design pressure, operating pressure during repair, pipe body temperature, coating type, etc.;
b) Defect information: defect number, relative location to mileage marker, defect type, defect dimensions, defect location;
c) Pipeline maintenance and modification information: pipeline maintenance records and as-built documentation.
The above information and data shall be recorded with reference to Appendix A.
4.2 The manufacturer of the steel sleeve shall possess the People's Republic of China Special Equipment Manufacturing License (Pressure Pipeline Components) qualification and shall be certified under the ISO quality management system or other quality management systems with corresponding qualifications. Manufacturing shall be carried out according to the requirements of the Manufacturing Procedure Specification (MPS) document. If specified by the purchaser, the MPS document shall be approved by the purchaser before implementation. The MPS document shall at least include the following content:
— Raw materials:
• Manufacturer name;
• Steel grade;
• Product type and dimensions;
• Chemical composition.
— Sleeve processing:
• Forming process;
• Heat treatment process (if applicable);
• Machining dimensional tolerances;
• Inspection and testing requirements;
• Traceability.
— Additional requirements, such as coating and marking, packaging, transportation, etc.
5 Structural Design of Epoxy Steel Sleeve
The epoxy steel sleeve shall consist of a steel sleeve, defect filling material (if any), and gap filling material. The steel sleeve includes steel plates, bolted connection flanges, bolts, lifting lugs (if any). The steel plates are provided with vent holes (inspection holes), positioning holes, and injection holes. The gap filling material is composed of one or more composite materials such as filling resin and fiber cloth, as shown in Figure 1.
6 Steel Sleeve
