Some standard content:
ICS 47. 020. 20
Registration No.: 11137-2003
Ship Industry Standard of the People's Republic of China
CB/T3920—2002
Consulting CB/T 3930-[959
Screw-tube for marine auxiliary boiler
Screw-tube for marine auxiliary boiler2002—11 -20 Issued by: Commission of Science, Technology and Industry for National Defense Issued by: Commission of Science, Technology and Industry for National Defense 2003-0201 Implementation This standard generally applies to (B/T3920-1999 for the combustion of boiler fuel pipe 3, CB/3920-2002) B/T392-1999 is the notice of the National Bureau of Measurement and Production Supervision on the abolition of professional standards and the adjustment of the former professional standards and relevant standards for the industry after the adjustment of the former professional standards and relevant standards for the industry, and was directly adjusted from 231.41001-1990 in June 1999. This standard is the same as 92-2001, and the following modifications are made: The technical requirements for wave pressure test and powder flaw detection are added to the 4th "Technical requirements". For Chapter 5 " The test method "dates" and specific test methods and effectiveness regulations. The international standard is implemented on the 11th, gas warning CB/T3920-1999. This international standard was issued by the China Shipbuilding Industry Planning Group. This standard is issued by the China Shipbuilding Industry Comprehensive Technical Economics Research Institute! The island service is expected to expand! China Classification Society, China Shipbuilding Industry Comprehensive Technical Economics Research Institute, Jiang Yingjing Steel Protection Group Co., Ltd., China Classification Society Nanjing Branch is responsible for the drafting of this standard. The main people: Lao Wen, Qiu Kadong, Bu Guangjing, Che Rui, Chongxin, Liu Guoliang, this year, this standard is 190: April, the first issue: June 1909, the lock is downgraded to the industry standard, scope
marine auxiliary boiler threaded pipe wwW.bzxz.Net
This standard specifies the classification, requirements, test piece method and inspection agent CP/T 3920- 2002
This standard applies to the design, manufacture and acceptance of marine auxiliary boilers with a pressure of not more than 2.5a and the working medium being water or steel and steam
2 Normative references
The provisions in the above-mentioned normative documents become the provisions of this standard through reference in this standard. The following referenced documents with a date or edition number are not applicable to this standard after the paid revision or revision in 2002. However, it is recommended that all parties using this standard explore the possibility of using its latest version. The following referenced documents without a date or edition number are not applicable to this standard. The latest version of the referenced documents shall be used in this standard. C3/T2102 Acceptance, packaging and marking of steel pipes, i.e. quality indication G33? Low main pressure cooker protection without chain pipe GR/11037 Auxiliary cooker protection and receiving container with indication of rate and strength test method 924 Material entry and inspection of energy-saving steel J7.471D Nondestructive testing of powerless container Specification for steel coastal entry and construction 3 Classification The structural type of corrugated pipe is shown in the figure! China Ship Lock: 2001 CB/T 3920-2002 Frequency-effect pipe size should comply with the provisions of Table:
Needle competition and relaxation
12. 11, 17, : 6, 18, 20
[4. 15, 16, =8, 20, 22, 24
16, :9. 20, 22, 24. 25
13. 20, 22, 24, 6, J0, 32
20, 22, 22, 28, 30. 32, FF
21. 28, 30. J2. 36. 40
Note: The length of the teaching tube is increased by the design,
33 marking example
I. 1, 2. 2, I. J, 1. 4
1. 2. 2. 3. 1. 4, 1. 5
1.3, =.4, 1.1, 1.6
1. 4, 1. 5. 1. b, 1. 7
1. 3, 1. 6. 1. 7, 1. 9
1. 6, 1. Y . 1. K, 1. 9 | 2. 4, 2. 5. 2. 6. 2. r2, 3, 2, 4, 2. 5, 2.6, 2. 7. 2. 9 The outer diameter of the self-tube width K
50--100
is 51m for 10# seamless steel pipe refrigeration, the total thickness is 3. mm, the pitch is 25nm, and the thread is 2: threaded pipe 10-51x3.5x25x2CB/T3920-26024 requires
4.! , the visual grade of the relatively large pipe can be washed 36V or 410! In order to ensure the lowest price, you can choose seamless pipes made of materials not lower than 2000mm in the world, such as CR387 No. 0 or No. 20 standard. And the inspection shall be carried out according to the requirements of CB/T392. 4.2 The surface of the pipe shall not have cracks, folds, folds, scars, delamination or hairline, and there shall be no obvious marks on the surface of the upper horizontal pipe section. The overall difference of its size should be in accordance with the provisions of Table 2. The lower straight section should be in accordance with GE3097. The concave steps at both ends should be gradually transitioned to the specified depth and shallowness within a pitch of the pull-out. The fuel efficiency pipe should be tested by hydraulic pressure after the deformation. It should be able to withstand 2 times the set pressure, and the water will not deform or leak. 4.4 The magnetic detection of the fuel efficiency pipe should also be carried out according to the 4730 standard. Grade 11 is qualified: 5 Test method 5.1 Material The material of the fuel efficiency pipe should be checked by the method of / 24. The result should meet the requirements of 4.1. Surface quality and size The surface quality should be visually inspected by the staff. The size should be inspected with the corresponding tools. It should meet the requirements of 4.2. 5.3 Concave wall thickness reduction rate.
CB/T 3920—2002
5.3.1 The thickness reduction test shall be conducted at three points, namely, the two ends and the middle. When sampling at both ends, the first thread shall not be sampled.
5.3.2 The thickness reduction test shall be conducted at the test point only, and the section shall be read along the thread. The test section shall be as close as possible to the diameter of the pipe to the center of the thinning. The result shall meet the requirements of 4.2: 5.4 Thread concave shape
Cut from the thread starting point to the thread axis, and check the depth: the result shall meet the requirements of Article 3. 5.5 The submerged test of hydraulic pressure corrugated pipes shall be carried out in accordance with GB/T110, and the results shall meet the requirements of Article 4. 5.6 Flaw detection: The magnetic detection shall be carried out at three points, namely, the two ends and the middle of the pipe, but not within the first butterfly distance of the two ends: the expansion length of the frequency line of each test point shall be checked, and the test shall be carried out in accordance with R4730-94, and the results shall meet the requirements of Article 1.5. 1 Inspection classification: The inspection of noise level is divided into two categories: identification inspection and quality inspection. 6.2 Inspection conditions: Unless otherwise specified, the winter test shall be carried out under natural conditions. 6.3 Inspection: 6.3.1 The following conditions apply. i Setting inspection: a) system, sealing material, when there is a major change in the work, normal production for 4 years. Setting inspection items and methods are specified in Table 3, Table 3 Training Association National Clothing Quantity and Size Relevant Grid Shadow Release Course Material Section Requirements Straight Strip Number Test Method Model Number Setting Inspection According to CB/3H24 Table Sample Number Early Number Inspection Every 5% is not less than " ||6.3.3 During the appraisal inspection, some parts are judged as qualified according to the requirements. If any of the inspection items do not meet the requirements, after taking corrective measures, the parts or only the unqualified items shall be re-tested, and there are still items that do not meet the requirements and these inspections are judged as unqualified.
6.4 Quality conformity inspection
6.4.1 Quality conformity inspection shall be carried out before the product is completed or shipped. 6.4.2 The items and methods of quality conformity inspection shall be specified in Table 1.3. The quality of the quality plate consistency test is a single quality. If the probe tube fails any of the quality tests, the unqualified items shall be inspected later. If necessary, all items shall be subjected to heat test. 6.4.4. The judgment rules for the combustion system section shall be in accordance with the CB/T S920-2002. 7. Packaging, marking and quality certificate. The packaging, marking and quality certificate of the solenoid tube shall comply with the provisions of CB/T S920-2002.
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