GB 30813-2014Welded austenitic stainless steel tubes and pipes for nuclear power plant (English PDF)

Foreword

This standard 5.1.2,5.4,5.5,6.1,6.4.1.2,6.4.2,6.5,6.9, Chapter 7, Chapter 8, Chapter 9 is mandatory, the rest are Recommended.

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

The standard reference to EN10217-7:2005 "Pressure welded steel tubes - Part 7 - Technical delivery conditions. stainless steel tube" to develop.

The standard proposed by China Iron and Steel Association.

This standard by the National Steel Standardization Technical Committee (SAC/TC183) centralized.

This standard was drafted. Zhejiang Jiuli Special Materials Technology Co., Ltd., Jiangsu Wujin Stainless Steel Co., Ltd., metallurgical industry-standard information Associate Research Institute, Suzhou Thermal Power Research Institute Co., Ltd., Shanxi Taigang Stainless Steel Co., Ltd..

1 Scope

This standard specifies the classification of nuclear power plants with austenitic stainless steel welded pipe, code, size, shape, weight and tolerances, to technology Requirements, test methods, inspection rules, packaging, marking and documentation.

This standard applies to nuclear power plant nuclear safety and non-nuclear Class 2,3 safety device level pressure parts made of austenitic stainless steel welded pipe.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 222 chemical composition of finished steel tolerance Determination of GB/T 223.11 steel and alloy chromium content of visual titration or potentiometric titration Spectrophotometric determination of titanium content GB/T 223.16 Methods for chemical analysis of iron, steel and alloy The chromotropic acid GB/T 223.18 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation - determination of copper content Iodometry GB/T 223.19 Methods for chemical analysis of iron, steel and alloy neocuproine - chloroform extraction spectrophotometric determination of copper content GB/T 223.21 Methods for chemical analysis of iron, steel and alloy 5-Cl-PADAB spectrophotometric determination of cobalt content GB/T 223.22 Methods for chemical analysis of iron, steel and alloy nitroso R salt spectrophotometric determination of cobalt content GB/T 223.23 steel and alloy - Determination of nickel content dimethylglyoxime spectrophotometry Determination of nickel content GB/T 223.25 Methods for chemical analysis of iron, steel and alloy dimethylglyoxime gravimetric method GB/T 223.26 steel and alloy - Determination of molybdenum content - Thiocyanate spectrophotometric GB/T 223.28 Determination of molybdenum steel and alloy chemical analysis method alpha- benzoin gravimetric method GB/T 223.36 Methods for chemical analysis of iron, steel and alloy distillation - neutralization titration method for the determination of nitrogen GB/T 223.37 Methods for chemical analysis of iron, steel and alloy distillation - indophenol blue photometric method for the determination of nitrogen GB/T 223.58 Methods for chemical analysis of iron, steel and alloys of sodium arsenite - sodium nitrite determination of manganese content titration GB/T 223.59 Steel and Alloy Determination of phosphorus content by bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometry GB/T 223.60 Methods for chemical analysis of iron, steel and alloy perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.62 Methods for chemical analysis of iron, steel and alloy butyl acetate extraction spectrophotometric determination of phosphorus content GB/T 223.63 Methods for chemical analysis of iron, steel and alloy The sodium (potassium) for Determination of amount GB/T 223.64 steel and alloy manganese content - Flame Atomic Absorption Spectrometry Determination of sulfur content of potassium iodate titration method after GB/T 223.68 Methods for chemical analysis of iron, steel and alloy tube furnace combustion GB/T 223.69 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method GB/T 223.72 steel and alloy sulfur content - Gravimetric method GB/T 223.75 Determination of methanol distillation steel and alloy of boron content - Curcumin spectrophotometric GB/T 223.84 steel and titanium alloys - Determination of two methane antipyrine spectrophotometry After GB/T 223.85 steel and alloy sulfur content induction furnace combustion infrared absorption method After the determination of GB/T 223.86 total carbon content and alloy steel induction furnace combustion infrared absorption method RT Test Method. Test Part 1 GB/T 228.1 metallic materials tensile GB/T 229 metal Charpy pendulum impact test method GB/T 232 metallic materials - Bend test GB/T 241 metal pipe Hydrostatic pressure testing GB/T 246 metal pipe Flattening test methods GB/T 2102 Acceptance, packing, marking and quality certification GB/T 2650 welded joint impact test GB/T 2975 Steel and steel products for mechanical testing and sample preparation position GB/T 3323 metal fusion welded joints radiography Intergranular corrosion of stainless steel crystal GB/T 4334-2008 Corrosion of metals and alloys - Test methods GB/T 4338 high-temperature metallic materials - Tensile testing GB/T 6394 Determination of average grain size of metal GB/T 7735 steel pipe eddy current testing method GB/T 11170 Determination of multi-element stainless steel spark discharge atomic emission spectrometry (Routine method) GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method GB/T 20123 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (conventional method) GB/T 20124 Steel - Determination of nitrogen content of inert gas fusion thermal conductivity method (conventional method) GB/T 21835 welded steel pipe size and weight per unit length JB/T 4730.3 Non-destructive testing of pressure equipments - Part 3. Ultrasonic testing JB/T 4730.5 Non-destructive testing of pressure equipments - Part 5. penetrant testing JB/T 7902 NDT radiographic testing linear IQI

3 Classification and designation

3.1 Pipe manufacturing methods fall into two categories by product, category and symbol.

a) the state of welding. H;

b) heat treatment. T.

3.2 The following codes apply to this part.

D. outside diameter (nominal diameter, unless otherwise specified or the calculated diameter, is calculated nominal diameter or outside diameter).

S. Wall thickness (unless otherwise specified nominal wall thickness or wall thickness calculation, the calculation is the nominal wall thickness or wall thickness).

4 Ordering content

Pipe ordered under this standard contract or order should include the following.

a) the standard number;

b) the product name;

c) nuclear safety level;

d) steel grades;

e) Dimensions (diameter × wall thickness, in millimeters);

f) Order number (total weight or length);

g) Delivery status;

h) special requirements.

5 Size, shape, weight and tolerance

6 Technical Requirements

Grades and chemical composition of the steel 6.1

6.1.1 Steel grades and chemical composition (melting analysis) should meet the requirements of Table 2.

6.1.2 should be finished steel chemical composition analysis. Nuclear Safety Class 2,3 finished steel chemical composition shall comply with the requirements of Table 2; non-nuclear security Full grade steel chemical composition of the finished product tolerances shall comply with the provisions of GB/T 222's.

7 S31653 022Cr17Ni12Mo2N >=220 >=520 >=45 >=30

7.93

7.90

7.93

8.03

8.00

8.00

8.04

6.5 Process Performance

6.5.1 Flattening test an outer diameter of not more than 219.1mm pipe should be flattening test. An outer diameter of not more than 50mm steel ring flattening taking samples; outer diameter Greater than 50mm but not more than 219.1mm take C-shaped steel flattened specimens. During the test, the weld should be in the direction of the force of 90 °.

Heat-treated steel, the sample should be pressed to distance between two flat pipe diameter of 1/3; steel without heat treatment, the samples should be pressed to two flat Distance between the plates is 2/3 of the pipe diameter.

After flattening, the sample does not allow cracks or gaps.

6.5.2 Weld transverse bending test 6.5.2.1 219.1mm outside diameter greater than the transverse weld pipe bending test should be done. Bend test specimens shall be welded steel plate or interception, Welded plates shall be the same steel grade, the same heat, the same thickness, the same heat treatment system and the same welding process. For small wall thickness 20mm in steel, should take a bending test, bending test should include a face bend test, a back bend test (steel outer and inner weld Weld respectively in the maximum bending surface); for pipe wall thickness greater than 20mm, should take two full-thickness side bend test.

6.5.2.2 When a bending test bending the specimen core diameter three times the thickness, the bending angle of 180 °. After bending the sample weld areas allowed Cracks or gaps.

6.6 intergranular corrosion test Steel intergranular corrosion test should be done. After the test sample is not allowed to intergranular corrosion tendency test methods in Appendix A.

6.7 hydraulic testing Steel hydraulic test should be carried out by the root. Test pressure according to equation (2) calculation of the maximum test pressure of 20MPa, the regulator should be less than the time 15s. Under test pressure, pipe leakage is not allowed.

p = 2SR/D (2)

Where.

p --- test pressure in megapascals (MPa);

S --- nominal pipe wall thickness, in millimeters (mm);

D --- steel pipe nominal outside diameter in millimeters (mm);

R --- allowable stress, in megapascals (MPa), nuclear safety grade steel press 2,3 Rp0.2 minimum specified in Table 3, 70%, non-nuclear Steel security level specified in Table 3 Rp0.2 minimum of 50%.

Grade steel for non-nuclear safety, the need to agree, before use for eddy current testing instead of hydraulic tests. When the eddy current testing, comparative sample tube artificial shortage Trap shall comply with GB/T 7735 in the acceptance level A.

Water hydraulic test requirements negotiated by both parties and specified in the contract.

6.8 Non-destructive testing 6.8.1-ray inspection

6.8.1.1 Nuclear Safety Class 2,3 full-length weld pipe respond 100%-ray detector. The method of radiographic testing shall comply with Appendix B of Regulation the remaining requirements set ray detection methods should be consistent with the provisions of GB/T 3323's.

According to the requirements, negotiated by both sides, and specified in the contract, use other methods to detect radiation and/or inspection requirements.

6.8.1.2 According to the requirements, negotiated by both sides, and in the contract, non-nuclear safety grade steel can be welded in accordance with GB/T 3323 Seam-ray detector, the detection rate negotiated by both parties and specified in the contract.

6.8.2 penetrant testing the outer surface of the pipe weld Nuclear Safety Class 2,3 shall be JB/T 4730.5 liquid penetrant inspection. When penetrant inspection, the size of more than 2mm defects should be recorded; where the presentation of the following defects should be displayed indicating the location and make clear.

--- Linear defect display;

--- Nonlinear defect size exceeds 4mm display;

--- 3 or more than 3 arranged in rows, and the edge spacing is less than 3mm defect display;

--- On a rectangular area of 100cm2, there are a total of eight or more intensive defects revealed that the long side of the rectangle of not more than 20cm, and the assessment of indications from the most disadvantaged areas.

6.8.3 Ultrasound

For wall thickness of not less than 2,3 nuclear safety 6mm grade steel, they use steel or steel tube (except welds) shall JB/T 4730.3 ultrasonic testing, acceptance requirements for quality level of not less than two.

According to the requirements, negotiated by both sides, and specified in the contract, other methods may also be used ultrasonic testing and/or inspection requirements.

6.9 surface quality

6.9.1 steel inner and outer surfaces should be smooth, does not allow the existence of stratification, cracks, folds, heavy leather, twist, pickling, descaling and other residues Hinder defect use. These defects should be completely removed, clear the depth should not exceed the thickness of negative deviation, and its clean-up at the actual wall thickness of not less than the minimum wall thickness allowed.

6.9.2 Nuclear Safety Class 2,3 steel surface quality should meet the following requirements.

a) the use of comparative specimen or sample tube steel measuring surface roughness Ra, the subject surface should be dry, clean and free of oil, grease and coatings table the surface roughness Ra should not exceed 12.5µm;

b) within the pipe weld counterpart wrong side of the wall thickness should not exceed 10%, and a maximum of 2.0mm;

c) does not allow the presence of scratches, pitting, pits, collapse, shrink groove, undercut, honeycomb defects, local uplift and slag;

d) When the grinding surface defects at or on the surface quality of doubt, the manufacturer shall be liquid penetrant inspection, liquid penetrant examination shall comply 6.8.2 regulations.

6.9.3 weld defects may be repaired, but the repair should be re-hydraulic testing, heat treatment delivery pipe should be re-heat Management. 2,3 grade steel for nuclear safety, should be in accordance with 6.8.2 after repair liquid penetrant inspection, welding, but the number should not exceed the same site 2 times.

6.9.4 steel inside and outside weld reinforcement shall meet the following requirements.

a) is not greater than the wall thickness of 8mm steel pipe, weld reinforcement shall not exceed 10% S 0.5mm; steel pipe wall thickness greater than 8mm, weld Reinforcement should not exceed S/6;

Within the weld reinforcement b) exceeds a predetermined height should be polished to the predetermined range.

6.10 special requirements According to the requirements, the agreement by both sides, and noted in the contract, increase the following test items.

a) high-temperature tensile test;

b) austenite grain inspection;

c) to check the cleanliness of the steel surface.

7 Test methods

7.1 pipe size and shape should meet the accuracy requirements of the measuring gage by root.

7.2 inner and outer surfaces of the tubes shall visually inspected by the root under sufficient lighting conditions.

7.3 Number of test samples of other steel items, sampling methods and test methods should be consistent with the provisions of Table 4.

Table 4 pipe test items, the number of sampling and testing methods

Test item number of samples Sampling Methods Test Method A chemical composition of each heat takes a sample GB/T 20066 GB/T 223, GB/T 11170, GB/T 20123, GB/T 20124 2 base material at room temperature tensile test each batch of samples from each of a GB/T 2975 GB on two steel/T 228.1 3 transverse weld at room temperature tensile tests on each batch a sample from each of two steel GB/T 2975 GB/T 228.1 4 room temperature impact test each batch of samples from each of three groups of three on a steel pipe GB/T 2975, GB/T 2650 GB/T 229, GB/T 2650 5 flattening test each batch of samples from each of a GB/T 246 GB/T 246,6.5.1 on two tubes

6 Weld transverse bending test each batch of samples taken 2 GB/T 232 GB/T 232 on a steel pipe 7 intergranular corrosion test each batch of samples from each one in two tubes GB/T 4334-2008, Appendix A GB/T 4334-2008, Appendix A 8 hydraulic test by root - GB/T 241

9 Eddy current testing by the root - GB/T 7735

Ray detector 10 6.8.1 - GB/T 3323, Appendix B

11 Liquid penetrant examination 6.8.2 - JB/T 4730.5,6.8.2

12 Ultrasonic Testing 6.8.3 - JB/T 4730.3

13 High-temperature tensile protocol GB/T 2975 GB/T 4338

Austenite grain size 14 agreement GB/T 6394 GB/T 6394

8 Inspection Rules

8.1 inspection and acceptance Pipe inspection and acceptance carried out by the supplier quality and technical supervision departments.

8.2 Batch rules

Batches pipe inspection and acceptance. Each batch should be the same brand, the same heat, the same size, the same welding process and the same heat treatment Pipe system (heats) of the composition. The number of each batch of steel should not exceed the following provisions.

a) is not greater than the outer diameter of 57mm, 400-gen;

b) outer diameter larger than 57mm but not more than 219.1mm, 200 gen;

c) greater than the outer diameter of 219.1mm, 100 roots.

8.3 Number of Samples the number of samples of each batch of the test pipe shall conform to Table 4.

8.4 reinspection and decision rules Pipe reinspection shall comply with judgment rules GB/T 2102's.

8.5 Re-heat treatment Mechanical and technological properties unqualified steel pipes, can be re-heat treatment. After the re-heat-treated steel should submit a new batch test Income. Re-heat treatment only allowed once.

9 cleaning, packaging, marking and documentation Use oil-free before packing steel 9.1, dry and clean compressed air or other suitable methods for the inner and outer surfaces of the steel pipe c...