CN102809639A

CN102809639A - Method for evaluating steel plate for ASME (American Society of Mechanical Engineers) nuclear first-class vessel

Info

Publication number: CN102809639A
Application number: CN2011101460070A
Authority: CN
Inventors: 刘焕
Original assignee: DALIAN SHIPBUILDING INDUSTRY EQUIPMENT MANUFACTURING Co Ltd
Current assignee: DALIAN SHIPBUILDING INDUSTRY EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2011-06-01
Filing date: 2011-06-01
Publication date: 2012-12-05

Abstract

The invention provides a method for evaluating a steel plate for an ASME (American Society of Mechanical Engineers) nuclear first-class vessel, which belongs to the field of evaluation of a common carbon steel plate. A technical scheme is as follows: the method comprises the following steps of: after obtaining a common carbon steel plate through a material or a stock material according to requirements of NCA-3855.5 in Division NCA of Section III of ASME specification, first proving that no welding operation is available on the steel plate; and then carrying out chemical component analysis on the steel plate; executing all inspection and test items required in technical specifications of the material (SA516-485); and finally, issuing a certified material test report by a manufacturer so as to prove that the material satisfies all requirements of nuclear first-class SA516-485; therefore, the steel plate can be used for ASME nuclear first-class equipment; and the method for evaluating the steel plate for the ASME nuclear first-class vessel, provided by the invention, has the advantages that cost can be saved and the purchasing period can be reduced so as to reduce the manufacturing period of the equipment.

Description

A kind of method of evaluating ASME nuclear one-level steel plate for container

Technical field

The present invention relates to a kind of method of the ASME of evaluation nuclear one-level steel plate for container, belong to the evaluation field of plain carbon steel plate.

Background technology

SA-516-485 is widely used in nuclear one-level equipment; But because other factors such as economic factors or duration; Can not directly use nuclear one grade steel plate, ASME allows the requirement of equipment manufacturing according to standard, through a series of check and pilot project; Non-nuclear grade steel plate is assessed as nuclear one grade steel plate, supplies with other nuclear power generating equipment manufacturing planies or be used for the equipment of its manufacturing.Because the domestic manufacturing plant that do not allow uses this kind mode to obtain qualified nuclear one grade steel plate; And this evaluation process is relatively complicated, seldom has manufacturing plant successfully the plain carbon steel steel plate to be assessed as qualified nuclear one-level steel plate for container according to the requirement of standard.

Summary of the invention

In view of the defective that prior art exists, the purpose of this invention is to provide a kind of method that can be generalized to the evaluation ASME nuclear one-level steel plate for container of each nuclear power generating equipment factory use.

For realizing above-mentioned purpose; The technical solution that the present invention adopted mainly is: a kind of method of the ASME of evaluation nuclear one-level steel plate for container, according to the requirement of ASME standard III volume NCA bundling NCA-3855.5, behind material or stock material acquisition plain carbon steel steel plate; At first prove and do not carry out any welding operation on this steel plate; Carry out chemical composition analysis then, carry out all checks and the pilot project that require in material (SA516-485) the technical specification book, provide the authentication material test report by manufacturing plant at last; Prove that this material meets all requirements of nuclear one-level SA516-485, then this steel plate can be used for ASME nuclear one-level equipment.

A kind of method of evaluating ASME nuclear one-level steel plate for container; Its beneficial effect is: according to the respective specified of ASME III volume NCA bundling; Through a series of check test project, the common non-carbon steel sheet of examining level is assessed as the nuclear one-level uses carbon steel sheet, both can practice thrift cost; Can shorten procurement cycle again, and then shorten the manufacturing cycle of equipment.

Description of drawings

Fig. 1 is the sampling point synoptic diagram of sample;

Fig. 2 is a style tension test synoptic diagram;

Fig. 3 is a style Charpy-type test synoptic diagram.

Embodiment

Further specify according to the method for accompanying drawing below a kind of ASME of evaluation nuclear one-level steel plate for container:

Its concrete estimation steps is:

1, at first the steel plate of not evaluation is done reception evaluation inspection;

2, ultrasound examination; The thick 18mm of sheet material, during cutting sample, test specimen is 50mm apart from the steel plate edge; Sample dimensions is 500 * 400mm.

3, produce steel plate evaluation test specimen;

1) by from left to right, order from top to bottom, the sample among the figure is respectively tensile sample, chemical analysis sample, impact specimen, grain size sample, sample drops hammer.

2) the thick 18mm of steel plate.

3) among the figure from left to right spacing be respectively 30mm, 23mm, 13mm, 13mm, 13mm, 53mm, 53mm, 53mm,

53mm、53mm、53mm。

When 4) producing impact specimen, the upper surface of impact specimen is apart from surface of steel plate 6mm.

4, produce chemical analysis sample, do the chemical analysis test; Chemical analysis sample is 50mm apart from the steel plate edge; The sample length and width is respectively 50mm, thick 18mm.

5, produce the grain size test sample, do the grain size test; The grain size sample is 50mm apart from the steel plate edge; The sample length and width is respectively 30mm, thick 18mm.

6, produce tensile test piece, carry out tension test; 1) all radiuss of corner (R) should equate public affairs

Difference is for 1.25mm, and two fillet centers of curvature of every end should with the mutual square crossing of sample center line (on line) perpendicular to center line, tolerance is in 2.5mm.The section of reducing end must not differ more than the 0.05mm.Its width can be reduced to the centre by two ends gradually in addition, but the width at two ends can not be than the big 0.10mm of middle part width.The two ends of sample should be symmetrical with the section of reducing (A) center line, and symmetry should be in 1.0mm; T is the thickness of sheet material.

2) L >=200mm among the figure; B >=60mm; A >=60mm; W=12.5 ± 0.25mm; G=50.0 ± 0.10mm; R >=13mm; C ≈ 20mm; T=18mm.

7, produce the drop-weight test sample, carry out drop-weight test; Drop-weight test is carried out according to the requirement of ASTM E208-91, and test energy is 350J, and test temperature is not higher than-13 ℃, when under a temperature, there being two samples not break, and T then _NDTBe exactly that this temperature deducts 5 ℃, promptly-18 ℃.

8, produce the Charpy-type test sample, carry out Charpy-type test; Drop-weight test is carried out according to the requirement of ASTM E208-91, and test energy is 350J, and test temperature is not higher than-13 ℃, when under a temperature, there being two samples not break, and T then _NDTBe exactly that this temperature deducts 5 ℃, promptly-18 ℃.

9, do material marking;

10, provide the authentication material test report;

11, do acceptance inspection by passing material;

12, make marks and put in storage.

Claims

1. evaluate the method that ASME examines the one-level steel plate for container for one kind; Requirement according to ASME standard III volume NCA bundling NCA-3855.5; Behind material or stock material acquisition plain carbon steel steel plate, it is characterized in that: at first prove and do not carry out any welding operation on this steel plate, carry out chemical composition analysis then; Carry out all checks and the pilot project that require in material (SA516-485) the technical specification book; Provide the authentication material test report by manufacturing plant at last, prove that this material meets all requirements of nuclear one-level SA516-485, then this steel plate can be used for ASME nuclear one-level equipment.

2. a kind of method of evaluating ASME nuclear one-level steel plate for container according to claim 1, it is characterized in that: concrete estimation steps is: 1, at first the steel plate of not evaluation is done receiving the evaluation inspection; 2, ultrasound examination; 3, produce steel plate evaluation test specimen; 4, produce chemical analysis sample, do the chemical analysis test; 5, produce the grain size test sample, do the grain size test; 6, produce tensile test piece, carry out tension test; 7, produce the drop-weight test sample, carry out drop-weight test; 8, produce the Charpy-type test sample, carry out Charpy-type test; 9, do material marking; 10, provide the authentication material test report; 11, do acceptance inspection by passing material; 12, make marks and put in storage.