GB/T 5312-2025 (GB/T 5312-2009) PDF EnglishUS$85.00 · In stock · Download in 9 seconds
GB/T 5312-2009: Carbon and carbon-manganese steel seamless steel tubes and pipes for ship Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 5312: Historical versions
GB/T 5312-2009: Carbon and carbon-manganese steel seamless steel tubes and pipes for ship---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5312-2009GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.75 H 48 Replacing GB/T 5312-1999 Carbon and Carbon-manganese Steel Seamless Steel Tubes and Pipes for Ship Issued on. OCTOBER 30, 2009 Implemented on. MAY 1, 2010 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of Contents1 Scope... 4 2 Normative References... 4 3 Classification and Code Number... 6 4 Ordering Information... 7 5 Dimension, Shape, Weight and Allowable Deviation... 7 6 Technical Requirements... 9 7 Inspection and Testing Methods... 13 8 Inspection Rules... 15 9 Packing, Marking and Quality Certificate... 15 Appendix A (Informative) Mechanical Properties under High Temperature of Carbon and Carbon-manganese Steel Seamless Steel Tubes and Pipes for Ship ... 16ForewordThis standard was revised by referring to the technical contents of seamless steel tubes and pipes in "Rules for Material and Welding" (2006 edition) issued by the China Classification Society (CCS). This standard replaces GB/T 5312-1999 "Carbon and Carbon-manganese Steel Seamless Steel Tubes and Pipes for Ship". There have been some significant changes in this standard over GB/T 5312-1999 as follows. - The ordering information was added; - The marking samples were deleted; - The external diameter allowable deviation of hot rolled (extruded) steel tubes and pipes were modified; - The allowable length deviation levels were added; - The index for the straightness in full length was added; - The content of sulfur and phosphorus was modified; - The smelting process of steel was modified; - The methods of bending test were modified; - The Appendix A and B of original standard were cancelled. Appendix A of this standard is informative. This standard was proposed by China Iron and Steel Association. This standard shall be under the jurisdiction of the National Technical Committee on Iron and Steel of Standardization Administration of China. Drafting organization of this standard. Baoshan Iron & Steel Co., Ltd. Participating drafting organizations of this standard. Panggang Group Chengdu Steel & Iron Co., Ltd. and Jiangyin Jieda Shaped Tube Co., Ltd. Chief drafting staffs of this standard. Luo Yuqing, Zhang Yaofei, Liu Cailing, Li Qi, Xue Jianliang and Yang Fan. The previous editions replaced by this standard are as follows. - GB/T 5312-1985, GB/T 5312-1999. Carbon and Carbon-manganese Steel Seamless Steel Tubes and Pipes for Ship1 ScopeThis standard specifies the classification, code number, dimension, shape, weight, technical requirements, testing method, inspection rules, packing, marking and quality certificate of carbon and carbon-manganese steel seamless steel tubes and pipes for ship (hereinafter referred to as steel tubes and pipes). This standard is applicable to the carbon and carbon-manganese steel seamless steel tubes and pipes used for Grade I and I pressure piping system, boilers and super-heaters for manufacturing ships.2 Normative ReferencesThe following standards contain the provisions which, through reference in this text, constitute the provisions of this standard. For dated reference, the subsequent modification or revisions of these publications do not apply. However, all parties who reach an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard. GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method (GB/T 223.5-2008, ISO 4829-1.1986, ISO 4829-2.1988, MOD) GB/T 223.12 Methods for Chemical Analysis of Iron - Steel and Alloy The Sodium Carbonate Separation- Diphenyl Carbazide Photometric Method for the Determination of Chromium Content GB/T 223.26 Iron Steel and Alloy-Determination of Molybdenum Content-The Thiocyanate Spectrophotometric Method GB/T 223.53 Methods for Chemical Analysis of Iron - Steel and Alloy -The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nickel Content GB/T 223.54 Methods for Chemical Analysis of Iron - Steel and Alloy--The Flame Atomic Absorption Spectrophotometric Method for the Determination of Nickel Content (GB/T 223.54-1987, eqv ISO/DIS 4940.1986) GB/T 223.59 Iron Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method GB/T 223.63 Methods for Chemical Analysis of Iron - Steel and Alloy; The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content GB/T 223.68 Methods for Chemical Analysis of Iron - Steel and Alloy The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content3 Classification and Code Number3.1 Steel tubes and pipes are classified into two categories according to the manufacturing methods. The categories and code numbers are as follows. 3.2 Steel tubes and pipes are classified into seamless steel tubes and pipes used for pressure piping system AND seamless steel tubes and pipes used for boilers and super-heaters, according to the functions. 3.2.1 Seamless steel tubes and pipes used for pressure piping system are classified into three grads according to the design pressure and temperature as shown in Table1. 3.2.3 Expression methods are as follows.4 Ordering InformationThe contract or order for purchasing steel tubes and pipes according to this standard shall include the following contents.5 Dimension, Shape, Weight and Allowable Deviation5.1 Outer diameter and wall thickness 5.1.1 The dimension of series 1 in Table 1 of GB/T 17395 shall be preferred for steel tubes and pipes. As required by the purchaser, steel tubes and pipes of other dimension may be supplied based on the agreement of both the supplier and the purchaser. 5.4 Pipe end shape Both end faces of steel tubes and pipes shall be vertical to the tube and pipe axes and notch burrs shall be cleaned away. 5.5 Out-of-roundness and wall unevenness As required by the purchaser and indicated in the contract, the out-of-roundness and wall unevenness of steel tubes and pipes on the same section shall not exceed 80% of the outer diameter tolerance and wall thickness tolerance respectively. 5.6 Delivered weight Steel tubes and pipes may be delivered according to actual weight or theoretical weight. The theoretical weight per meter shall be in accordance with the requirements of GB/T 17395 (the steel density is 7.85 kg/dm3).6 Technical Requirements6.1 Steel grade and chemical composition 6.1.1 Steel grade and chemical composition (heat analysis) shall be in accordance with those specified in Table 4. 6.2 Manufacturing methods 6.2.1 Smelting process of steel Steels shall be smelted by electric furnace with external refining or oxygen converter with external refining. 6.3 Delivery state Steel tubes and pipes shall be delivered in normalized conditions. If the finishing temperature of hot rolled steel tubes and pipes is not less than Ar3, it may be deemed as normalizing. 6.4 Mechanical properties 6.4.1 Longitudinally mechanical properties of those steel tubes and pipes in delivery state shall meet those specified in Table 5. 6.4.3 Impact test As required by the purchaser, impact test may be conducted for the steel tubes and pipes with a wall thickness greater than 10mm based on the agreement of both the supplier and the purchaser and indicated in the contract. 6.5 Hydraulic test Hydraulic test shall be carried out for steel tubes and pipes one by one and the test pressure shall be calculated according to Formula (1), which shall not be greater than 14 MPa. Under the test pressure, pressure stabilizing time shall not be less than 10s and the steel tubes and pipes shall be free from leakage. 6.7 Surface quality No crack, folding, lamination, scar and creasing is allowed on the internal and external surfaces of the steel tubes and pipes. All of these defects shall be eliminated and the actual wall thickness at the eliminating places shall not be less than the minimum allowable wall thickness deviation.7 Inspection and Testing Methods7.1 The dimension and shape of steel tubes and pipes shall be measured one by one with measuring instruments meeting the precision requirements. 7.2 The internal and external surfaces of steel tubes and pipes shall be inspected visually one by one at sufficient lighting condition.8 Inspection Rules8.1 Inspection and acceptance The inspection and acceptance of steel tubes and pipes shall be carried out by the quality and technical supervision department of the supplier. 8.2 Lot grouping rules 8.2.1 Steel tubes and pipes are inspected and accepted based on lots. 8.3 Re-inspection and judgment rules The re-inspection and judgment rules of steel tubes and pipes shall meet the requirements of GB/T 2102.9 Packing, Marking and Quality CertificateThe packing, marking and quality certificate of steel tubes and pipes shall comply with those specified in GB/T 2102. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
