GB/T 34204-2025Coiled tubing (English PDF)

National Standard of the People's Republic of China

ICS

77.140.75

Classification

H 48

Replacing

GB/T 34204-2017

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

• PrefaceV
• 1 Scope1
• 2 Normative references1
• 3 Terms and Definitions3
• 4 Symbols and abbreviations5
• 4.1 Symbols5
• 4.2 Abbreviations6
• 5 Order Contents6
• 5.1 Contents that the purchaser should provide6
• 5.2 Contents that the buyer can choose6
• 5.3 Internal pipe/cable coiled tubing8
• 6 Technical Requirements8
• 6.1 Material Requirements8
• 6.2 Manufacturing Process8
• 6.3 Steel grade, designation and chemical composition11
• 6.4 Tensile properties15
• 6.5 Hardness17
• 6.6 Impact18
• 6.7 Flatten18
• 6.8 Flaring19
• 6.9 Weld Macro20
• 6.10 Metallography20
• 6.11 Fatigue test20
• 6.12 Crush Test20
• 6.13 Corrosion test of stainless steel coiled tubing20
• 6.14 Anti-sulfur coiled tubing corrosion test20
• 6.15 Hydrostatic Pressure21
• 6.16 Diameter21
• 6.17 Length, dimensions and weight per unit length21
• 6.18 Weight per unit length23
• 7 Inspection and testing23
• 7.1 Chemical composition23
• 7.2 Mechanical properties24
• 7.3 Macroscopic view of weld seams27
• 7.4 Metallographic Examination27
• 7.5 Fatigue test27
• 7.6 Crush test27
• 7.7 Stainless Steel Coiled Tubing Corrosion Test27
• 7.8 Anti-sulfur coiled tubing corrosion test29
• 7.9 Hydrostatic pressure test29
• 7.10 Diameter test30
• 7.11 Length and size inspection30
• 7.12 Invalid Test30
• 7.13 Retest and determination31
• 7.14 Inspection by the Buyer33
• 8 Non-destructive Testing (NDT)33
• 8.1 General Principles33
• 8.2 Verification by comparison with standard sample33
• 8.3 Personnel Qualifications33
• 8.4 Testing standards33
• 8.5 Nondestructive testing methods34
• 8.6 Radiographic testing of steel strip butt welds and pipe-to-pipe butt welds34
• 8.7 Other non-destructive testing of welds36
• 8.8 Ultrasonic and electromagnetic testing of longitudinal welds36
• 8.9 Magnetic Particle and Liquid Penetrant Testing38
• 8.10 Handling of defects and imperfections38
• 9 Logo39
• 9.1 General Principles39
• 9.2 Flag Order39
• 9.3 Length39
• 10 Packaging and Protection39
• 10.1 Coating39
• 10.2 Protection39
• 10.3 Transport reel40
• 11 File40
• 11.1 General requirements40
• 11.2 Quality Certificate40
• 11.3 Record keeping40
• Appendix A (Normative) Welding Procedure Qualification for Steel Strip Butt Welding, Pipe-to-Pipe Butt Welding and Union Butt Welding47
• Appendix B (Normative) Pipe-to-pipe butt welding requirements47
• Appendix C (Normative) Minimum elongation after fracture48
• Appendix D (Informative) Coiled Tubing Full-Scale Fatigue Test Method57
• Appendix E (Normative) Dimensions of ball gauges and clearances from the inner surface of steel pipes61
• Appendix F (Normative) Dimensions, weight per unit length and hydrostatic test pressure66
• Appendix G (Normative) Buyer Inspection76
• Appendix H (Normative) Supplementary Nondestructive Testing Requirements77
• Appendix I (Informative) Coiled Tubing Transport Reel80
• Reference82
• Figure 1 Full cross-section specimen24
• Figure 2 Longitudinal arc specimen24
• Figure 3 Sampling position and direction of longitudinal arc specimen24
• Figure 4 Full wall thickness hardness test indentation position25
• Figure 5 NDT comparison standard37
• Figure A.1 Guided bending test specimen44
• Figure A.2 Bending die for guided bending test44
• Figure A.3 Schematic diagram of union macro test specimen45
• Figure D.1 Coiled tubing fatigue testing machine57
• Figure D.2 Bending die structure58
• Figure D.3 Sectional structure of bending die58
• Figure D.4 Specimen straightness measurement method58
• Figure I.1 Schematic diagram of transport reel and shift fork80
• Table 1 Symbols and descriptions5
• Table 2 Abbreviations and Explanations6
• Table 3 Information to be provided by the purchaser6
• Table 4 Requirements that can be selected by the purchaser7
• Table 5 Scrape groove depth10
• Table 6 Chemical composition of carbon steel and alloy steel coiled tubing11
• Table 7 Chemical composition of quenched and tempered coiled tubing12
• Table 8 Chemical composition of sulfur-resistant coiled tubing12
• Table 9 Common stainless steel coiled tubing grades and unified digital codes and their chemical compositions13
• Table 10 Tensile properties of carbon steel and alloy steel coiled tubing15
• Table 11 Tensile properties of stainless steel coiled tubing16
• Table 12 Hardness17
• Table 13 Impact Absorption Energy18
• Table 14 Distance between two plates for flattening test18
• Table 15 Intergranular corrosion test acceptance requirements20
• Table 16 Acceptance requirements for resistance to hydrogen-induced cracking21
• Table 17 Acceptance requirements for sulfide stress development (SSC)21
• Table 18 Permissible deviation of outer diameter22
• Table 19 Wall thickness tolerance22
• Table 20 Variation of wall thickness of adjacent steel strips23
• Table 21 4% Metal Wire Image Quality Meter35
• Table 22 2% Metal Wire Image Quality Meter35
• Table 23 Qualified Limit37
• Table 24 Record keeping41
• Table A.1 Guided bending test bend die dimensions45
• Table C.1 Elongation after fracture48
• Table D.1 Bend die radius corresponding to typical pipe diameter specimens59
• Table E.1 Ball gauge dimensions and clearance from the inner surface of the steel pipe61
• Table F.1 Steel pipe dimensions, unit length weight and hydrostatic test pressure (SI)66
• Table I.1 Ratio of reel diameter to steel pipe diameter Table I.2 Reel fork dimensions81