Skip to product information
1 of 10

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 24593-2009 English PDF (GBT24593-2009)

GB/T 24593-2009 English PDF (GBT24593-2009)

Regular price $70.00 USD
Regular price Sale price $70.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: 24-hr self-service. Click GB/T 24593-2009
See Chinese contents: GB/T 24593-2009

GB/T 24593-2009: Welded austenitic stainless steel tubes for boiler and heat-exchanger

This Standard specifies the dimension, shape, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of welded austenitic stainless steel tubes for boiler and heat exchanger.
GB/T 24593-2009
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.75
H 48
Welded austenitic stainless steel tubes for
boiler and heat-exchanger
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 Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Order content ... 6
4 Dimensions, shape, weight and allowable deviations ... 7
5 Technical requirements ... 9
6 Test methods ... 16
7 Inspection rules ... 17
8 Packaging, marking and quality certificates ... 18
Foreword
This Standard is developed by referring to ASTM A249/A249M-08 ?€?Welded austenitic steel boiler, superheater, heat-exchanger, and condenser tubes?€?.
This Standard is proposed by China Iron and Steel Association.
This Standard is under the jurisdiction of National Technical Committee on Iron and Steel of Standardization Administration of China.
Drafting organizations of this Standard. Zhejiang Jiute Materials Technology Co., Ltd., Metallurgical Industry Information Standards Institute, Jiangsu Wujin Stainless Steel Tube Plant Group Co., Ltd.
Main drafters of this Standard. Cao Zhiliang, Shao Yu, Ji Hai, Huang Ying, Cai Xingqiang, Liu Mingzhou and Song Jianxin.
Welded austenitic stainless steel tubes for
boiler and heat exchanger
1 Scope
This Standard specifies the dimension, shape, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of welded austenitic stainless steel tubes for boiler and heat exchanger. This Standard applies to welded austenitic stainless steel tubes for medium-and-low- pressure boiler and heat exchanger.
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223.11 Iron steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content GB/T 223.17 Methods for chemical analysis of iron steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.26 Iron steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.28 Methods for chemical analysis of iron, steel and alloy - The ??- benzoinoxime gravimetric method for the determination of molybdenum content GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation GB/T 223.37 Methods for chemical analysis of iron steel and alloy - The indophenal blue photometric methods for the determination of nitrogen content after distillation separation
GB/T 223.40 Iron steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
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 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content 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 content
GB/T 223.69 Iron steel and alloy - Determination of carbon contents - Gas- volumetric method after combustion in the pipe furnace
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228- 2002, eqv ISO 6892.1998)
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1. Test method (scales A, B, C, D, E, F, G, H, K, N, T) (GB/T 230.1-2004, ISO 6508-1.1999, MOD) GB/T 241 Metal materials - Tube - Hydrostatic pressure test
GB/T 242 Metal materials - Tube - Drift-expending test (GB/T 242-2007, ISO 8493.1998, IDT)
GB/T 245 Metallic materials - Tube - Flanging test (GB/T 245-2008, ISO 8494.1998, IDT)
GB/T 246 Metallic materials - Tube - Flattening test (GB/T 246-2007, ISO 8492.1998, IDT)
GB/T 2102 Acceptance packing marking and quality certification of steel pipe GB/T 2975 Steel and steel products - Location and preparation of test pieces for mechanical testing (GB/T 2975-1998, eqv ISO 377.1997)
GB/T 4334 Corrosion of metals and alloys - Test methods for intergranular corrosion of stainless steels (GB/T 4334-2008, ISO 3651-1.1998, ISO 3651-2.1998, MOD) GB/T 6394 Metal - Methods for estimating the average grain size
GB/T 7735 Steel tubes - The inspection method on eddy current test (GB/T 7735- 2004, ISO 9304.1989, MOD)
GB/T 11170 Method for photoelectric emission spectroscopic analysis of stainless steel
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284.1996, IDT) GB/T 20123 Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) (GB/T 20123-2006, ISO 15350.2000, IDT)
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (GB/T 20124-2006, ISO 15351.1999, IDT)
GB/T 20878-2007 Stainless and heat-resisting steels - Designation and chemical composition
GB/T 21835 Dimensions and masses per unit length of welded steel pipes
3 Order content
The contract or order for the steel tubes ordered according to this Standard shall include the following content.
a) reference to this Standard;
b) product name;
c) designations of steel;
5.2.1 Smelting methods for steel
Priority is given to primarily-smelted molten steel plus refining outside the furnace. 5.2.2 Manufacturing method for steel tubes
5.2.2.1 The steel tubes shall be manufactured by automatic welding without the addition of filler metal. The welding seam or the whole steel tube shall be conducted with cold deformation process after the welding and before the final heat treatment of the steel tubes.
5.2.2.2 Negotiated by the supply and demand parties, and being specified in the contract, the method of cold deformation process and the minimum deformation may be specified.
5.3 Delivery status
The steel tubes shall be delivered after heat treatment and acid pickling; but the steel tubes being heat treated by the protective atmosphere can be delivered without acid pickling. Recommended heat treatment specifications of steel tubes refer to Table 4. Negotiated by the supply and demand parties, and specified in the contract, the steel tubes can use other heat treatment specifications beyond Table 4. The actual heat treatment specification shall be indicated in the quality certificate.
Table 3 Steel designation and chemical composition
5.4 Mechanical properties
5.4.1 Tensile test
The tensile properties of the steel tubes after heat treatment shall comply with the requirements in Table 4.
5.4.2 Hardness test
The steel tubes with a wall thickness of not less than 1.7 mm shall be conducted with Rockwell hardness test according to GB/T 230.1, the average hardness value shall comply with the requirements in Table 4. Negotiated by the supply and demand parties, and specified in the contract, the steel tubes or welding seams with a wall thickness of less than 1.7 mm can also be conducted with hardness test.
where
H - The distance between parallel pressing plates after flattening, in millimeters (mm);
?? - The deformation coefficient per unit length, which of all steel tubes in this Standard are taken 0.09;
S - The wall thickness of steel tubes, in millimeters (mm);
D - Th...

View full details