GB/T 40317-2021 English PDF (GB/T40317-2021)

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GB/T 40317-2021: Seamless stainless steel pipes for oxygen pipeline
GB/T 40317-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
CCS H 48
Seamless stainless steel pipes for oxygen pipeline
ISSUED ON: AUGUST 20, 2021
IMPLEMENTED ON: MARCH 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and Definitions ... 6
4 Classification and code ... 6
5 Order contents ... 6
6 Dimensions, shape and weight ... 7
7 Technical requirements ... 10
8 Test methods ... 14
9 Inspection rules ... 16
10 Packaging, marking and quality certificate ... 16
Appendix A (Normative) Determination method of grease residue on the surface of the
steel pipe ... 18
Seamless stainless steel pipes for oxygen pipeline
1 Scope
This document specifies the classification and code, order content, size, shape, weight,
technical requirements, test methods, inspection rules, packaging, marking and quality
certificates of the stainless-steel seamless steel pipe for oxygen pipeline.
This document applies to stainless steel seamless steel pipes (hereinafter referred to as
“steel pipes”) for conveying oxygen and liquid oxygen.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
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 223.25 Methods for chemical analysis of iron, steel and alloy. The
dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.28 Methods for chemical analysis of iron, steel and alloy. The α-benzoin
oxime gravimetric method for the determination of molybdenum content
GB/T 223.40 Iron, steel and alloy -- Determination of niobium content by the
sulphochlorophenol S spectrophotometric method
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 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium
(potassium) periodate photometric method for the determination of manganese
content
GB/T 223.84 Steel and iron -- Determination of titanium content --
Diantipyrylmethane spectrophotometric method
GB/T 223.85 Steel and iron -- Determination of sulfur content -- Infrared absorption
method after combustion in an induction furnace
GB/T 223.86 Steel and iron -- Determination of total carbon content -- Infrared
absorption method after combustion in an induction furnace
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 241 Metal materials -- Tube -- Hydrostatic pressure test
GB/T 242 Metal materials -- Tube -- Drift-expending test
GB/T 246 Metallic materials -- Tube -- Flattening test
GB/T 1031 Geometrical Product Specifications (GPS) -- Surface texture: Profile
method -- Surface roughness parameters and their values
GB/T 2102 Acceptance, packing, marking and quality certification of steel pipe
GB/T 2975 Steel and steel products -- Location and preparation of samples and test
pieces for mechanical testing
GB/T 5777-2019 Automated full peripheral ultrasonic testing of seamless and
welded (except submerged arc-welded) steel tubes for the detection of longitudinal
and/or transverse imperfections
GB/T 7735-2016 Automated eddy current testing of seamless and welded (except
submerged arc-welded) steel tubes for detection of imperfections
GB/T 11170 Stainless steel -- Determination of multi-element contents -- Spark
discharge atomic emission spectrometric method (Routine method)
GB/T 17395 Dimensions, shapes, masses and tolerances of seamless steel tubes
GB/T 20066 Steel and iron -- Sampling and preparation of samples for the
determination of chemical composition
GB/T 20123 Steel and iron -- Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method)
a) When the wall thickness is not greater than 15 mm, it is 1.5 mm/m;
b) When the wall thickness is greater than 15 mm, it is 2.0 mm/m.
6.4 Terminal outline
6.4.1 The end faces of both ends of the steel pipe shall be perpendicular to the axis of
the steel pipe, and the burrs shall be removed from the incision.
6.4.2 According to the requirements of the buyer, after negotiation between the supplier
and the buyer, and indicated in the contract, the two ends of the steel pipe can be
processed with grooves, and the groove type can be determined by negotiation between
the supplier and the buyer.
6.5 Out of roundness and uneven wall thickness
The out-of-roundness and uneven-wall-thickness of the steel pipe shall not exceed 80%
of the outer diameter tolerance and wall thickness tolerance, respectively.
6.6 Weight
6.6.1 Steel pipes shall be delivered by actual weight. According to the requirements of
the buyer, after negotiation between the supplier and the buyer, and indicated in the
contract, the steel pipe can be delivered according to the theoretical weight.
6.6.2 The theoretical weight per meter of the steel pipe is calculated according to
formula (1):
Where:
W --- Theoretical weight per meter of steel pipe, in kilograms per meter (kg/m);
π --- Pi, to be taken as 3.1416;
ρ --- Density of steel, in kilograms per cubic decimeter (kg/dm3), see Table 4 for the
density of steel;
S --- Wall thickness of steel pipe, in millimeters (mm);
D --- The nominal outer diameter of the steel pipe, in millimeters (mm).
6.6.3 For steel pipes delivered according to the nominal outer diameter and the
minimum wall thickness, the theoretical weight shall be calculated by the average wall
thickness; the average wall thickness shall be the average value of the maximum and
minimum wall thickness calculated according to the wall thickness and the allowable
deviation.
and the buyer, and indicated in the contract, other test pressure can be used for the
hydraulic pressure test.
7.5.4 With the consent of the purchaser, the supplier can replace the hydraulic pressure
test with eddy current inspection; the acceptance level of eddy current inspection shall
comply with E4H or E4 regulations of GB/T 7735-2016.
7.6 Processing property
7.6.1 Flattening
The steel pipe shall be subjected to a flattening test. During the flattening test, the
sample shall be pressed to that the distance between the two plates reduces to H; H is
calculated according to formula (3). After flattened, there shall be no cracks or splits on
the outside of the bend of the sample.
Where:
H --- The distance between the two plates, in millimeters (mm);
α --- Deformation coefficient per unit length, to be taken as 0.09;
S --- Wall thickness of the steel pipe, in millimeters (mm);
D --- The nominal outer diameter of the steel pipe, in millimeters (mm).
7.6.2 Flarin...