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GB/T 37606-2019: Titanium-steel clad or lined pipes
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Titanium-steel clad or lined pipes
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GB/T 37606-2019
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Basic data | Standard ID | GB/T 37606-2019 (GB/T37606-2019) | | Description (Translated English) | Titanium-steel clad or lined pipes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H48 | | Classification of International Standard | 77.140.75 | | Word Count Estimation | 18,157 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37606-2019: Titanium-steel clad or lined pipes---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Titanium-steel clad or lined pipes
ICS 77.140.75
H48
National Standards of People's Republic of China
Titanium-steel composite pipe
2019-06-04 release
2020-05-01 implementation
State Administration of Market Supervision
Published by China National Standardization Administration
Contents
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Classification 2
5 Order content 3
6 Dimension, shape, weight and allowable deviation 3
7 Technical requirements 4
8 Test method 9
9 Inspection rules 10
10 Packaging, marking and quality certificate 10
Appendix A (Normative Appendix) Weight Calculation Method of Compound Management Theory 12
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by China Iron and Steel Industry Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183).
This standard was drafted. Hunan Xiangtou Jintian Technology Group Co., Ltd., Jiangsu Zhongxin Green Pipe Industry Technology Co., Ltd., Shangshangde
Sheng Group Co., Ltd., Hunan Xiangtou Jintian New Material Co., Ltd., and Metallurgical Industry Information Standard Research Institute.
The main drafters of this standard. Zhou Hui, Li Changyi, Liu Jianan, Chen Xiang, Ji Xuewen, Peng Dan, Dong Li, Xie Yi, He Zhongchen, Qian Lezhong, Yang Sheng,
Li Qi.
Titanium-steel composite pipe
1 Scope
This standard specifies the terms and definitions, classification, ordering content, size, shape, weight and allowable deviation of titanium-steel composite pipes, technical requirements,
Test methods, inspection rules, packaging, marking and quality certificates.
This standard is applicable to titanium, multi-layer, carbon structural steel, high-quality carbon used in petrochemical, marine equipment, power energy, environmental protection and other fields.
Structural steel or low-alloy high-strength structural steel is a composite pipe with a base layer (hereinafter referred to as "composite pipe").
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 222 steel product chemical composition allowable deviation
GB/T 223.3 Methods for chemical analysis of iron, steel and alloys. Diantipyrine methane phosphomolybdic acid gravimetric determination of phosphorus content
GB/T 223.5 Determination of acid-soluble silicon and total silicon content in steel. Reduced silicate molybdate spectrophotometry
GB/T 223.11 Determination of chromium content in steel and alloys by visual or potentiometric titration
GB/T 223.12 Methods for chemical analysis of iron, steel and alloys-Sodium carbonate separation-Diphenylcarbazide photometric method for the determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloys Determination of vanadium content by tantalum reagent extraction spectrophotometry
GB/T 223.19 Methods for chemical analysis of iron, steel and alloys-New copperine-chloroform extraction photometric method for determination of copper content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloys. Determination of nickel content by butanedione oxime gravimetric method
GB/T 223.26 Determination of molybdenum content in steels and alloys thiocyanate spectrophotometric method
GB/T 223.32 Methods for chemical analysis of iron, steel and alloys Determination of arsenic content by sodium hypophosphite reduction-iodometric method
GB/T 223.37 Methods for chemical analysis of iron, steel and alloys-Distillation separation-Indophenol blue photometric method for determination of nitrogen content
GB/T 223.40 Determination of niobium content in steels and alloys Chlorosulfenol S spectrophotometric method
GB/T 223.58 Methods for chemical analysis of steel and alloys-Determination of manganese content by sodium arsenite-sodium nitrite titration method
GB/T 223.59 Determination of phosphorus content in iron, steel and alloys Bismuth phosphorus molybdenum blue spectrophotometry and antimony phosphorus molybdenum blue spectrophotometry
GB/T 223.60 Methods for chemical analysis of iron, steel and alloys-Determination of silicon content by perchloric acid dehydration gravimetric method
GB/T 223.61 Methods for chemical analysis of iron, steel and alloys-Determination of phosphorus content by ammonium phosphomolybdate capacity method
GB/T 223.67 Determination of sulfur content in iron, steel and alloys Methylene blue spectrophotometric method
GB/T 223.82 Determination of hydrogen content in iron and steel by inert gas pulse fusion thermal conductivity method
GB/T 223.84 Determination of titanium content in steel and alloys Diantipyrine methane spectrophotometric method
GB/T 223.86 Determination of total carbon content in steel and alloys. Infrared absorption method after combustion in induction furnaces
GB/T 228.1 Tensile test for metallic materials-Part 1. Test method at room temperature
GB/T 241 Metal pipe hydraulic test method
GB/T 246 Test method for flattening of metallic tubes
GB/T 699 high-quality carbon structural steel
GB/T 700 carbon structural steel
GB/T 1591 low alloy high strength structural steel
GB/T 2102 Acceptance, packaging, marking and quality certificate of steel pipes
GB/T 2650 Welded joint impact test method
GB/T 2651 Tensile test method for welded joints
GB/T 2653 Welded joint bending test method
GB/T 2975 Sampling location and sample preparation for mechanical properties test of steel and steel products
GB/T 3091 Welded steel pipe for low-pressure fluid transportation
GB/T 3620.1 Titanium and titanium alloy grades and chemical composition
GB/T 3620.2 Allowable deviation of chemical composition of titanium and titanium alloy processed products
GB/T 3624 titanium and titanium alloy seamless pipe
GB/T 3625 Titanium and titanium alloy tubes for heat exchangers and condensers
GB/T 4336 Determination of multi-element content in carbon steel and low-alloy steels by spark discharge atomic emission spectrometry (conventional method)
GB/T 4698 (all parts) Methods for chemical analysis of titanium, titanium and titanium alloys
GB/T 6396 Test method for mechanical and technological properties of composite steel plates
GB/T 8163 seamless steel pipe for fluid
GB/T 8547 titanium-steel composite plate
GB/T 9711 steel pipe for pipeline transportation system in oil and gas industry
GB/T 9948 seamless steel pipe for petroleum cracking
GB/T 11261 Determination of oxygen content in steel-Pulse heating inert gas fusion-infrared absorption method
GB/T 13793 straight seam welded steel pipe
GB/T 17395 seamless steel pipe size, shape, weight and allowable deviation
GB/T 20066 Sampling and sample preparation methods for determination of chemical composition of steel and iron
GB/T 20123 Determination of total carbon and sulfur content in iron and steel. Infrared absorption method after combustion in high frequency induction furnace (conventional method)
GB/T 20124 Determination of nitrogen content in iron and steel. Inert gas fusion thermal conductivity method (conventional method)
GB/T 20125 Determination of multi-element content in low alloy steels by inductively coupled plasma emission spectrometry
GB/T 21835 Welded steel pipe size and weight per unit length
GB/T 30062 steel tube terminology
NB/T 47013.2 Non-destructive testing of pressure equipment-Part 2. Radiographic testing
NB/T 47013.11 Non-destructive testing of pressure equipment-Part 11. X-ray digital imaging inspection
3 terms and definitions
The terms and definitions defined in GB/T 30062 and the following apply to this document.
3.1
Titanium is used as the composite layer, and carbon structural steel, high-quality carbon structural steel and low-alloy high-strength structural steel are used as the base.
4 Classification
4.1 The composite pipes are classified as follows.
a) Metallurgical composite straight seam welded pipes;
b) mechanical composite pipe.
4.2 The composite pipe is classified as follows according to the location of the layer.
a) inner layer;
b) outer layer.
5 Order content
A contract or order placed under this standard shall include the following.
a) the number of this standard;
b) product name;
c) Grade. grade of base material/grade of multi-layer material;
d) Dimensions (outer diameter × total wall thickness/multilayer wall thickness, unit is mm);
e) quantity ordered (total weight or total length);
f) manufacturing category;
g) location of the stratum (inner or outer);
h) delivery status;
i) Special requirements.
6 Size, shape, weight and tolerance
6.1 Outer diameter and wall thickness
The nominal outer diameter (D) of the composite pipe should be 16mm ~ 530mm, and the thickness of the cladding (S1) should not be less than 0.5mm.
Selection should meet the requirements of GB/T 17395 or GB/T 21835. According to the requirements of the purchaser, after consultation between the supplier and the purchaser and indicated in the contract,
Supply of composite pipes other than those specified in GB/T 17395 or GB/T 21835.
6.2 Allowable deviation of outer diameter and wall thickness
The allowable deviation of the nominal outside diameter and wall thickness of the composite pipe shall meet the requirements of Table 1. According to the requirements of the purchaser, after consultation between the supply and demand parties and the contract
It is indicated in the specification that composite pipes with tolerances other than those specified in Table 1 can be supplied.
Table 1 Allowable deviation of outer diameter and wall thickness in millimeters
Nominal outer diameter D
Allowable deviation of outer diameter Allowable deviation of wall thickness a
Tube end b Total wall thickness S Multilayer thickness S1
16 ~ < 20 ± 0.10 ± 0.10
20 ~ < 88.9 ± 0.75% D ± 0.5% D
88.9 ~ < 219 ± 0.75% D ± 0.75% D
219 ~ ≤530 ± 1% D or ± 3.2, whichever is smaller
± 10% S ± 10% S1
a Deviations in wall thickness do not apply to welds.
b Pipe end refers to the steel pipe within 100mm length of each end of the steel pipe.
6.3 Tube out of roundness
The roundness of the pipe body should not exceed 80% of the outer diameter tolerance.
6.4 Bend
6.4.1 The bending degree of the composite pipe shall not be greater than 2mm/m, and the total length bending degree shall not be greater than 0.2% of the length of the composite pipe.
6.4.2 According to the requirements of the purchaser, after consultation between the supplier and the purchaser, and in the contract, other bends may be specified.
6.5 Length
6.5.1 Normal length
The general length of the composite pipe should be 3000mm ~ 12000mm.
6.5.2 Cut-to-length
The fixed length of the composite pipe should be within the normal length range, and the allowable deviation of the fixed length is 50
0 mm. According to the demand side,
The parties have negotiated and stated in the contract that they can supply fixed-length tubes and other composite tubes with tolerances outside the usual length range.
6.6 Tip shape
6.6.1 The two ends of the composite pipe shall be cut perpendicular to the axis of the composite pipe, and the burrs in the cut shall be removed.
6.6.2 According to the needs of the demand side, after consultation between the supply and demand sides, and in the contract, the grooves can be processed at both ends of the composite pipe.
Determined by the parties.
6.7 Weight
6.7.1 The composite pipe is delivered according to the theoretical weight, or it can be delivered according to the actual weight.
6.7.2 The theoretical weight of the composite pipe shall be calculated in accordance with the provisions of Appendix A.
7 Technical requirements
7.1 Grades and chemical composition of composite pipes
7.1.1 Typical composite pipe cladding and base material grades shall meet the requirements of Table 2. According to the requirements of the purchaser, after consultation between the supply and demand parties, and
It is stated in the contract that other brands than Table 2 can be used.
Table 2 Typical composite pipe materials
Material standard number
Multilayer GB/T 3620.1 TA1G, TA2G, TA3G, TA4G, TA8, TA9, TA10, TC4
Grassroots
GB/T 699 20
GB/T 700 Q195, Q215A, Q215B, Q235A, Q235B
GB/T 1591, GB/T 8163 Q355B/Q345A, Q345B
GB/T 9711 L245 or B, L290 or X42, L320 or X46, L360 or X52
7.1.2 Except for the bonding interface, the chemical composition (smelting analysis) of the composite pipe cladding and base material shall meet the requirements of its corresponding standards. When needed
When the party requires the analysis of the finished product, it should be stated in the contract that the allowable deviation of the chemical composition of the basic product analysis should meet the requirements of GB/T 222
The multi-layer should meet the requirements of GB/T 3620.2.
7.2 Raw materials
7.2.1 The raw material titanium-steel composite steel plate (belt) for metallurgical composite straight seam welded pipes shall meet the requirements of GB/T 8547.
7.2.2 The base pipe and multi-layer pipe of mechanical composite pipe can be seamless or welded. When the base pipe is selected as a seamless pipe, it should comply with GB/T 8163,
According to the provisions of GB/T 9948 or GB/T 9711, the multi-layer pipe shall meet the requirements of GB/T 3624 or GB/T 3625, respectively. When the base pipe is selected
When welding pipes, they should meet the requirements of GB/T 3091, GB/T 13793 or GB/T 9711, and the multilayer pipes should meet the requirements of GB/T 3625.
Regulations.
7.2.3 The corresponding standards for the base pipe and the multi-layer pipe of the mechanical composite pipe shall be determined by the supplier and the buyer through consultation and specified in the contract. Composite front substrate tube
The internal and external burrs and oil stains of the multi-layer pipe shall be removed.
7.3 Manufacturing method
7.3.1 Metallurgical composite straight seam welded pipe
7.3.1.1 The composite pipe shall be welded by one or more of tungsten gas inert gas welding (GTAW) and plasma arc welding (PAW).
Method manufacturing. When the purchaser specifies a welding method or manufacturing process, it should be specified in the contract.
7.3.1.2 When welding the base layer, the base material should not be fused into the multi-layer; the welding of the multi-layer should adopt a low-energy welding process.
7.3.2 Mechanical composite pipe
The composite pipe should use a large inner diameter base pipe/multilayer pipe nested with a small outer diameter multilayer pipe/base pipe, which should be processed by spinning, drawing or hydraulic pressure.
Way to make.
7.3.3 Double longitudinal welds or girth welds of composite pipes
After consultation between the supply and demand parties, and in the contract, the composite pipe can have double longitudinal welds or girth welds. When the composite pipe is delivered with double longitudinal welds,
The circumferential distance between the two longitudinal welds shall not be less than.200mm. When the composite pipe is delivered with a girth weld joint, there should be no cross weld.
7.4 Delivery status
7.4.1 Metallurgical composite straight seam welded pipes shall be delivered in the welded state, and mechanical composite pipes shall be delivered in the cold processed state.
7.4.2 According to the requirements of the purchaser, after consultation between the supply and demand parties, and in the contract, the composite pipe can be delivered in other states.
7.5 Mechanical properties
7.5.1 Stretch
The composite pipe shall be subjected to a longitudinal tensile test at room temperature, and its mechanical properties shall meet the requirements of Table 3. Tensile test can use base sample or bag
Samples of total wall thickness including cladding. When the tensile test is performed according to the base layer, the multi-layer material should be completely removed.
Table 3 Mechanical properties of composite pipes
Base material
Lower yield strength
ReL/MPa
tensile strength
Rm/MPa
Elongation after breaking e
A /%
not less than
1 Q195 195a, b 315 20
Q215A
Q215B
215a 335 20
Q235A
Q235B
235a 370 20
4 20 245a 410 19
Q345A
Q345B
345a 470 18
Table 3 (continued)
Base material
Lower yield strength
ReL/MPa
tensile strength
Rm/MPa
Elongation after breaking e
A /%
not less than
6 Q355B 355a, c 470 18
7 L245 or B 245d 415 21
8 L290 or X42 290d 415 21
9 L320 or X46 320d 435 20
10 L360 or X52 360d 460 19
a In the tensile test, if the yield phenomenon is not obvious, Rp0.2 can be measured instead of ReL.
b The yield strength values of Q195 are for reference only and are not a condition of delivery.
c Q355B is the upper yield strength ReH.
d L245 or B, L290 or X42, L320 or X46, L360 or X52 determine the specified total tensile strength Rt0.5.
e When the total wall thickness tensile test is adopted, the standard value of elongation after breaking of the multi-layer is less than the standard value of the base layer, and the elongation of the composite pipe after breaking is less than the base layer but not less
When the standard value of the multi-layer is allowed, the multi-layer is allowed to be cut and only the base layer is subjected to a tensile test. The elongation after breaking should not be less than the standard value of the base.
7.5.2 Welded joint stretching
Metallurgical composite straight seam welded pipes with an outer diameter of not less than 114mm shall be subjected to tensile tests on welded joints. For those with an outer diameter not greater than 219.1mm
For metallurgical composite straight seam welded pipes, tensile test samples of welded joints can be sampled on the welding test plate.The welding test plate should be the same brand and the same furnace number as the composite pipe.
Same welding process. The tensile strength of welded joints shall be determined in accordance with the requirements of Table 3. During the test, the weld shall be located in the middle of the specimen.
The test specimen shall meet the requirements of 7.5.1.
7.5.3 Bonding interface shear strength or bonding strength
7.5.3.1 Metallurgical composite straight seam welded pipes with a thickness of not less than 1.5 mm shall be subjected to the joint interface shear strength (τ) test, and the value shall not be low
At 140MPa.
7.5.3.2 Metallurgical composite straight seam welded pipes with a cladding thickness of less than 1.5 mm shall be tested by flattening test for bonding strength and flattening test.
See 7.6.2, after the test, there should be no delamination or cracking between the base layer and the multi-layer of the pipe end.
7.5.4 Shear strength of mechanical composite pipe
7.5.4.1 The mechanical composite pipe shall be subjected to a shear strength test, and its value shall not be less than 0.5 MPa.
7.5.4.2 Use the method shown in Figure 1 for the shear strength test. Cut a section of circular pipe with a length of not less than 50mm and machine it
The method was processed into the structure shown in FIG. 1. A pressure test machine is used to apply a pushing force to the test tube section, so that a slip occurs between the stratum and the base layer,
Record the force value F (N) when the slip occurred. The shear strength is calculated according to formula (1).
P =
πDH
(1)
Where.
P --- Shear strength in megapascals (MPa);
F --- the pressure applied to the sample, the unit is Newton (N);
D --- the inner diameter of the outer tube, in millimeters (mm);
H --- the absolute height of the inner tube relative to the outer tube, in millimeters (mm).
In millimeters
Explanation.
1 --- indenter;
2--composite tube.
Figure 1 Schematic diagram of shear strength test
7.6 Process performance
7.6.1 Weld Guide Bend
Metallurgical composite straight seam welded pipes with a nominal outside diameter of not less than 219 mm and filled with metal shall be subjected to longitudinal seam guided bending tests. One
The group bending test should include a face bend test and a back bend test (that is, the outer and inner welds of the composite pipe are located on the most curved surface, respectively).
The weld shall be located in the middle of the test specimen, there shall be no repair welding weld on the test specimen, and the remaining height of the weld shall be removed. The specimen is bent about 180 ° in the bending die, and the core diameter is
8 times the total wall thickness. After the test, the following requirements should be met.
a) the specimen should not be completely broken;
b) There shall be no cracks longer than 3.2 mm in the weld metal on the specimen, regardless of depth;
c) The base layer, multi-layer, heat-affected zone or fusion line of the composite pipe shall not have a length greater than 3.2 mm or a depth greater than the specified wall thickness
10% crack;
d) During the test, cracks and joint surface cracks that appear on the edge of the specimen and have a length not greater than 6.4 mm should not be rejected
in accordance with.
7.6.2 Squash
Metallurgical composite straight seam welded pipes with a nominal outside diameter not less than 60.3mm shall be subjected to a flattening test. During the flattening test, the outer weld shall be located
90 ° or 270 ° direction of force. Place a pipe section with a length of not less than 63.5mm between the two flat plates, and perform the flattening test according to the following two steps.
a) The first step is the ductility test. The specimen is pressed to the distance H between the two flat plates, and the inner surface, outer surface and edges of the specimen shall not have cracks,
Fracture and cladding. H should be calculated according to formula (2).
H =
1.09S
0.09 S/D
(2)
Where.
H --- the distance between two flat plates, the unit is millimeter (mm);
S --- the total wall thickness of the composite pipe, in millimeters (mm);
D --- the outer diameter of the composite pipe, the unit is millimeter (mm).
b) The second step, integrity (closed flattening) test. Continue squashing until the test breaks or the two walls fit. Squash in the second step
In the test, the sample should not peel off from the clad layer and the base layer.
7.7 Hydraulic test
7.7.1 The composite pipe shall be hydraulically tested one by one. The test pressure is calculated according to formula (3) .The test pressure of metallurgical composite straight seam welded pipes should not be greater than
5.0MPa, the maximum test pressure of the mechanical composite pipe is consistent with the maximum test pressure specified by the standard implemented by the base steel pipe. Test pressure hold
The time should be no less than 10s. During the test, the composite pipe should not leak.
P = 2S2R/D (3)
Where.
P --- hydraulic test pressure value, in megapascals (MPa), rounded to the nearest 0.5MPa;
S2 --- base layer thickness, unit is millimeter (mm);
R --- Allowable stress, take 60% of the yield strength (or Rp0.2) specified in Table 3, in megapascals (MPa);
D --- the outer diameter of the composite pipe, the unit is millimeter (mm).
7.7.2 For mechanical composite pipes, hydraulic tests have been performed on the multi-layer and base-layer pipes in accordance with the corresponding standards, and the hydraulic tests may not be performed after compounding.
7.7.3 The supply and demand parties negotiate and indicate in the contract that other test pressures may be specified.
7.8 Nondestructive testing
The metallurgical composite welded pipe with the clad layer located in the inner layer shall be subjected to weld ray inspection and inspection technology in accordance with NB/T 47013.2 and NB/T 47013.11.
Grades, acceptance quality grades, and testing ratios are determined through consultation between the supply and demand sides.
7.9 Surface quality
The inner and outer surfaces of the composite pipe should be smooth, and there should be no folds, cracks, scars, twists, bubbles, or broken arcs. The above defects should be completely removed
The depth should not exceed the lower deviation of the nominal wall thickness, and the actual wall thickness at the clearing place should not be less than the minimum allowed wall thickness. Depth not exceed total
Local pits, pits, and roll marks under wall thickness deviation and underlayer wall thickness deviation are permitted.
7.10 Weld quality
The inner and outer welds of the composite pipe shall be completely welded and fused, and the deviation shall meet the following requirements.
a) Within 100mm from the pipe end, the inner weld shall be ground and the remaining height s...
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