JB/T 4748-2002 Nickel and nickel-based alloy explosive composite steel plates for pressure vessels
Some standard content:
B
Industry Standards of the People's Republic of China
JB/T 4748---2002
Nickel and nickel-based alloys for pressure vessels
Explosive composite steel plates
Explosive nickel and nickel-base alloy clad steel plate for pressure vessels
Released on 2002-08-22
Implemented on 2003-03-01
Released by the National Economic and Trade Commission
Foreword
1
Scope
Normative references
2
3
4
Terms and definitions||tt ||Type, size and weight
Level, mark···
5
Technical requirements
6
7
Test method
Inspection rules
8
9
Packaging, marking and quality certificate
Item
Normal school
+e+
times
+++.-..-...
+-+---+-*+++++ +
JB/T4748—2002
37
39
39
39
40
40||tt ||41
43
43
44
35
This standard is formulated for the first time.
Foreword
This standard is proposed by the National Pressure Vessel Standardization Technical Committee. This standard was approved by the National Economic and Trade Commission. This standard is under the jurisdiction of the Manufacturing Subcommittee of the National Pressure Vessel Standardization Technical Committee. JB/T 4748-
—2002
This standard was drafted by: Hefei General Machinery Research Institute, Sinopec Group Economic and Technical Research Institute, Sichuan Jinglei Technology Co., Ltd. and Shanghai Chemical Machinery No. 1 Factory.
The main drafters of this standard: Zhang Yong, Yang Guoyi, Zhang Wuqing, Liu Yongqiang, Chen Peixin, Wei Yongbiao. This standard is interpreted by the National Pressure Vessel Standardization Technical Committee. 37
1 Scope
Nickel and nickel-based alloy explosive composite steel plates for pressure vessels JB/T 4748-2002
1.1 This standard specifies the use of nickel and nickel-based alloys as cladding materials, The type, size, grade, technical requirements, test methods, inspection rules, packaging, markings and quality certificates of composite steel plates manufactured by explosion method using carbon steel or low alloy steel as the base material. 1.2 This standard applies to nickel and nickel-based alloy explosive composite steel plates for pressure vessels with a total thickness equal to or greater than 10mm. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard. GB150-1998 Steel Pressure Vessels
GB/T228-1987 Metal Tensile Test Method GB/T229-1994 Metal Charpy Notch Impact Test Method GB/T247-1997 Steel Plate and Steel Strip Inspection, Packaging, Marking and Quality General provisions for certificates GB/T709-1988 Dimensions, shapes, weights and full tolerances of hot-rolled steel plates and steel strips GB/T2975-1998 Sampling locations and sample preparation for mechanical property testing of steel and steel products GB/T3274-1988 Carbon Plain structural steel and low-alloy structural steel hot-rolled thick steel plates and steel strips GB3531-1996 Low-alloy steel plates for low-temperature pressure vessels (including modification order No. 1) GB/T5235-1985 Chemical composition and product shape of processed nickel and nickel alloys GB /T63961995 Test method for mechanical and process properties of composite steel plates GB6654—1996 Steel plates for pressure vessels (including modification orders No. 1 and 2) GB/T8888-1988 Packaging, marking, transportation and storage of heavy non-ferrous metal processing products GB/T15260— 1994 Nickel-based alloy intergranular corrosion test method JB4726-2000 Carbon steel and low alloy steel forgings for pressure vessels JB4727-2000 Low alloy steel forgings for low-temperature pressure vessels JB4730-1994 Non-destructive testing of pressure vessels
JB4733-1996 Pressure Explosive Stainless Steel Composite Steel Plate for Vessels JB4741-2000 Nickel-Copper Alloy Hot-rolled Plate for Pressure Vessels Safety Technical Supervision Regulations for Pressure Vessels (promulgated by the former State Administration of Quality and Technical Supervision in 1999) 3 Terms and Definitions
The following terms and definitions apply to this standard. 3.1
Composite interface
The bonding surface between the base material and the cladding material of the composite steel plate. 39 | | tt | | JB/T 4748--2002 | 3.3
Substrate
The matrix material in composite metal.
3.4
cladding material
cladding material in composite metal.
4 Type, size and weight
4.1 Type
4.1.1 The cladding material can be covered on one or both sides of the base material to form a single-sided or double-sided composite steel plate. 4.1.2 The shapes of composite steel plates are rectangular, square and round. Other shapes can be agreed upon by both parties. 4.2 Size
4.2.1 The thickness of the cladding material is 2 mm~15 mmbZxz.net
4.2.2 The minimum thickness of the base material is 8mm, and the ratio of the thickness of the base material to the thickness of the cladding material is usually not less than 3. 4.2 .3 The maximum width of the composite steel plate is 2000mm, the maximum length is 8000mm, and the maximum diameter of the circular composite steel plate is 4000mm. Composite steel plates exceeding the above dimensions can be supplied subject to agreement between the supplier and the buyer. 4.3 Weight
The composite steel plate is delivered according to the theoretical weight, and the weight calculation of the cladding material and base material is in accordance with the regulations of JB47412000 and GB/T7091988 respectively. The density of N6 board is 8.89g/cm2.
5
Grade, mark
5.1 grade
The grade of composite steel plate is as specified in Table 1.
Table 1
Level
5.2 mark
Level 1
Level 2
Level 3
Speciality||tt ||generation
level
number
B1
B2
B3
combination rate
%||tt| |100
≥98
≥95
The product mark of composite steel plate is composed of cladding material nickel and nickel-based alloy grade, base material grade, size, grade code, standard number, etc. . Example 1:
The NCu30 with a cladding thickness of 3mm, 16MnR with a base material thickness of 16mm, a grade 2 composite steel plate with a width of 1500mm and a length of 6000mm is marked: (NCu30+ 16MnR) -(3 + 16)× 1500× 6000 - B2 - JB/T 4748 Example 2:
N6 with a cladding thickness of 8mm, 16MnR with a base material thickness of 50mm, and a grade 1 composite steel plate with a diameter of 2000mm are marked: (N6 + 16MnR) -(8 +50)×Φ2000- B1 - JB/T 474840
6 Technical requirements
6.1 Cladding materials and base materials
JB/T 4748——2002||tt| |6.1.1 The standards and grades of cladding materials and base materials should comply with the provisions of Table 2, and the technical requirements of the base material should also comply with the provisions of GB150-1998. Table 2 Standards and grades used for cladding materials and base materials Cladding materials
Standard number
GB/T 5235--1985
JB 4741—2000
Grade number| |tt||N6
NCu30
Standard number
GB 150—1998
GB/T 3274—1988
GB 3531-1996|| tt | ||Q235 - B, Q235 - C
16MnDR
20R, 16MnR, 15MnNbR, 15CrMoR16Mn-20MnMo.15CrMc
16MnD.20MnMoD
Note: By agreement between the supply and demand parties , the base material can also use other brands according to the standards in the table (except GB/T3274-1988). 6.1.2 The cladding materials and base materials should be accompanied by a quality certificate (original) from the material manufacturer. The content of the material quality certificate should be complete and clear, and should be stamped with the quality inspection seal of the material manufacturer. If there is no original quality certificate, the relevant provisions of the "Pressure Vessel Safety Technical Supervision Regulations" (1999) should be followed.
6.2 Delivery status
Composite steel plates must be delivered after heat treatment, leveling, shearing (or cutting) and removal of oxide scale from the surface of the covering material. According to the requirements of the purchaser and stated in the contract, the surface of the cladding material can be sandblasted, polished or pickled. 6.3 Bonding state
6.3.1 The composite steel plate shall be ultrasonic tested, and its bonding state shall comply with the provisions of Table 3. 6.3.2 Welding repairs are allowed in unbonded areas exceeding the requirements in Table 3. Before welding repair, the covering material of the unbonded area should be removed and the surface of the base material should be polished. The depth should not exceed the negative deviation of the base material. Penetration testing should be carried out to confirm that the unbonded area has been removed. Then the welder with a valid certificate should weld according to the qualified welding procedure. Welding repair process. After welding repair, it shall pass ultrasonic and penetrant testing in accordance with the provisions of this standard. Welding repair records should be submitted to the purchaser. Table 3 Binding status
Level code
B1
B2
B3
Detection range
Full area range
Along the width direction of the steel plate, on parallel lines with a spacing of 50mm, and within a range of 50mm from the edge of the steel plate, the bonding state
does not allow the existence of unbonded areas, and the bonding rate is 100%. The length of a single unbonded area is not greater than 50mm. The area is not greater than 20cm2, the bonding rate is not less than 98%
The length of a single unbonded area is not greater than 75mm, the area is not greater than 45cm2, and the bonding rate is not less than 95%
Note 1: Adjacent unbonded areas , when the minimum distance between them is equal to or less than 20mm, it should be treated as a single unbonded area, and its area is the sum of the areas of each unbonded area.
Note 2: For B3 composite steel plates, those with a single unbonded area less than 9cm2 will not be counted. 6.4 Mechanical properties
6.4.1 The bonding shear strength of the composite interface of the composite steel plate should not be less than 200MPa. 6.4.2 The tensile test results of composite steel plates shall comply with the requirements in Table 4. When the base material is a forging and specified by the purchaser, only the tensile test of the base material can be carried out, and the test results should comply with the provisions of the base material standard. 41
JB/T 4748--2002
6.4.3 The impact absorption energy of the composite steel plate base material shall comply with the provisions of the base material standard. When the base material is a forging and specified by the purchaser, only the impact test of the base material can be carried out, and the test results should comply with the provisions of the base material standard. Table 4 Tensile test results
yield point.
MPa
Ga1 t + O2 t2
dm
Note:
Jel
t+ t2
Tensile strength b
MPa
Hh
Obi ti +O t2
+t
and not greater than the upper limit of the base material standard +35MPa-cladding material Service point or yield strength standard value, MPa. N6, 00.2 ≥ 100MPa; NCu30, 00.2 ≥ 195MPa; The base material is at the service point or the standard value of the service strength, MPa; Obl
Tk
The standard lower limit value of the tensile strength of the cladding material, MPa. N6, b ≥ 380MPa; NCu30, ≥ 460MPa; standard lower limit of base material tensile strength, MPa; t\-cladding material thickness, mm;
t2
-base material thickness, mm.
6.5 Bending properties
Elongation 5
%
not less than the base material standard value
Internal bending of the composite steel plate (the surface of the covering material is under pressure) , external bending (covering material surface tension) test conditions should comply with the provisions of Table 5. Composite steel plates whose base material is forgings are not subject to bending tests. || tt | is the diameter of the bending center, α is the thickness of the specimen)
Test results
There shall be no cracks on the outside of the bending part, and there shall be no delamination at the composite interface
Note: When the total thickness of the composite steel plate If it is larger than 25mm, thin it from the base material side to 25mm for bending test. 6.6 Intergranular corrosion test
According to the requirements of the buyer and upon agreement between the supplier and the buyer, the supplier may conduct an intergranular corrosion test on the composite steel plate cladding material. The test requirements and qualification standards shall be agreed upon by the supplier and the buyer.
6.7 Dimensional deviation and flatness
6.7.1 The allowable deviation of thickness of composite steel plate shall comply with the provisions of Table 6. The base material is a forged composite steel plate, and the allowable deviation of the thickness of the base material is agreed between the supplier and the buyer.
Table 6 Thickness Allowable Deviation
Coating Material Thickness Allowable Deviation
±10% of the nominal thickness of the cladding material, and not greater than ±1.0mm
Base Material Thickness Allowable Deviation
The upper and lower limits of the standard deviation of the base material are reduced by 0.5mm from the total thickness tolerance
The allowable deviation of the covering material + the allowable deviation of the base material
Note: The lower limit of the standard deviation of the base material is not greater than For a 0.5mm plate, the allowable thickness deviation is equal to the lower limit of the standard deviation. 6.7.2 The allowable deviation of the length and width of the composite steel plate shall be subject to the corresponding provisions of the base material standard, and the allowable deviation of the diameter of the circular composite steel plate shall be subject to the agreement between the supplier and the buyer.
6.7.3 The flatness of composite steel plates shall be in accordance with the provisions of GB/T709-1988. When the standard value of the yield point of the base material is greater than 460MPa, the flatness is 1.5 times the above value. The flatness of the composite steel plate used for the heat exchanger tube plate is agreed upon by the supplier and the buyer. 42 | If there are any of the above defects, they are allowed to be removed, but the minimum thickness of the cladding should be ensured after removal, otherwise they should be repaired by welding. The surface quality of the substrate should comply with the provisions of the substrate standards. 7 Test methods
7.1 The bonding state of the composite steel plate is determined by ultrasonic testing. The testing method is in accordance with the provisions of Appendix A of JB4733-1996. 7.2 Penetration testing shall be in accordance with the provisions of JB4730-1994. 7.3 The shear test, tensile test and bending test of composite steel plates shall be in accordance with the provisions of GB/T6396-1995. 7.4 The tensile test of the base material shall be in accordance with the provisions of GB/T228-1987. 7.5 The impact test of the composite steel plate base material shall be in accordance with the provisions of GB/T229-1994. 7.6 The intergranular corrosion test of composite steel plate cladding shall be in accordance with the relevant standards in GB/T15260-1994. 7.7 Dimensional inspection method
7.7.1 The total thickness of the composite steel plate is measured with a micrometer or caliper at a distance of not less than 40mm from the edge of the steel plate. Ultrasonic measurement can also be used. When using ultrasonic measurement, the regulations of JB4730-1994 should be followed. 7.7.2 The thickness of the cladding material of the composite steel plate shall be measured according to the provisions of Appendix A of GB/T6396-1995. 7.7.3 The length, width or diameter of the composite steel plate is measured with a steel tape measure. 7.7.4 The flatness of composite steel plates is measured according to the regulations of GB/T709-1988. 7.7.5 The surface quality of composite steel plates is subject to general visual inspection. Penetration testing may be conducted upon agreement between the supplier and the buyer. 8 Inspection rules
8.1 Composite steel plates shall be inspected by the supplier’s quality inspection department. 8.2 Composite steel plates should be delivered in batches, and each batch should be composed of composite steel plates produced by the same material combination (the cladding material and the base material are the same grade, the same thickness, and the same delivery status) and the same explosion and heat treatment process. 8.3 The inspection items of composite steel plates are as specified in Table 7. Ultrasonic testing, dimensions (except covering material thickness) and surface quality should be inspected one by one, and the remaining items are inspected on a batch basis. The items in the table that are inspected according to the requirements of the purchaser shall be carried out according to the provisions of the contract. Upon agreement between the supply and demand parties, inspection of other items can be carried out.
Table 7 Inspection Items
Inspection Items
Ultrasonic Testing
Shear Test
Tensile Test
Impact Test||tt| |Internal bending test
Outer bending test
Intergranular corrosion test
foot
inch
B1
o
o
o
o
o
O
level code
B2
o
o
o
o
O
B3
O
o
×
o|| tt||43
JB/T 4748---2002
Inspection items
Surface quality
Note:
○—Items that should be inspected;
- Items that are inspected as required by the purchaser;
- Items that do not require inspection.
B1
Table 7 (continued)
Level code
B2
O
B3
8.4 from each batch Samples can be prepared from one piece of the product or from test pieces prepared under the same batch conditions of the product. The sampling method shall be in accordance with the provisions of the corresponding base material standards. The number of specimens is as follows: 1 shear specimen, 1 tensile specimen, 3 impact specimens, 1 internal bending specimen, 1 external bending specimen, 2 intergranular corrosion specimens and cladding material thickness 1 sample. 8.5 If an item inspected by batch fails to pass the test, double the number of samples from the same batch will be taken for re-inspection of the unqualified item. If even one index of the retest results (including any index required by the test) fails, the batch of products shall not be delivered (the retest of the impact test shall be in accordance with the provisions of the base material standard). At this time, the supplier can inspect the steel plates one by one and deliver them by the plate, or the entire batch of steel plates can be heat treated and then submitted for inspection as a new batch.
9 Packaging, marking and quality certificate
9.1 Each composite steel plate should be marked with the product mark, batch number, manufacturer name (or factory label), and production date on the surface of the covering material at the end of the steel plate. wait. 9.2 When the composite steel plate is delivered, the quality certificate of the covering material and the base material should be provided, or a copy of the seal of the supplier's quality inspection department and the composite steel plate product quality certificate should be provided.
9.3 The surface of the composite steel plate covering material should be effectively protected to prevent scratches. 9.4 The remaining requirements shall be in accordance with the provisions of GB/T247-1997 and GB/T8888--1988 standards. 44
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.