Some standard content:
Shipbuilding Industry Standard of the People's Republic of China
CB 456-92
Steam Heat
Published on January 8, 1993
Published by China State Shipbuilding Corporation
Implemented on July 1, 1993
Shipbuilding Industry Standard of the People's Republic of China
1 Subject Content and Scope of Application
CB 456--92
Classification number, U42
Generate 456--66
This standard specifies the classification, technical requirements, test methods, inspection rules, packaging and storage requirements of steam hot water cabinets (hereinafter referred to as hot water cabinets).
This standard is applicable to hot water cabinets heated by steam in ships and drilling semi-delayed fresh water replacement systems. 2 Reference standards
GB573 Ship lap welding steel method
G Nai 712 Structural steel for body
GB2506 Ship lap welding steel flange (four-position) GB3323 Steel olefin welding butt joint line and dynamic quality classification GB4237 Stainless steel hot-rolled steel plate
GBI1037 Marine auxiliary boiler and pressure vessel wave pressure test method ZB L141 (105 Inspection of raw materials for marine auxiliary boilers entering the factory 3 Product classification
3.1 List of parameters of hot water tanks Table 1. www.bzxz.net
Setting capacity
Maximum working capacity
3.2 The structural type of hot water tank is shown in the figure.
Reverse water temperature
China Shipbuilding Industry Corporation 1993.07-08 Approved water outlet temperature
Steam pressure
Heated water
Steam type
1993-07-01 Implementation
Towing room
Fuel tank
Refrigeration technology This
method release
hot water Xie knot average diagram
.al.im
consulting fee:
,"export
release port record
1 body: 2 pressure gauge: 3 optional version, 4-heating pipe 3.3 basic dimensions of hot water cabinet according to table 2.
5 strengthen bacteria: 6 kidney plate.? cover; 8.-thermometer water accumulation
heating area
3.4 standard collection example
through the hot water of 0.m:
water extraction plate n.5CB155-
4 technical requirements
CB 456.-92
333: 1 6S4
4.1
4.3.1 The complete heat treatment frame shall include safety limit, temperature regulator, pressure gauge, thermometer, condensation release, etc. This fuel supply shall meet the requirements of the pressure.
412 The safety opening shall be large and small. 4.1.3 The working pressure shall be marked with a red line on the pressure gauge scale. The pressure gauge is of level 5, and its range is 1.5 times the working positive force.
4.1.4 The inlet and outlet flanges of the hot water board shall meet the requirements of GB573 and GB2506. 4.1.5 The body of the hot water board shall be able to withstand the design pressure of 1.5 times without damage and obvious deformation. The complete set of hot water tubes shall be tested for tightness under 1.25 times the pressure, and there shall be no leakage. 4.3.5 The steam heating pipe is bent into a shape that can withstand 1.5 times the steam force. The complete set of steam heaters is tested under a natural force of 1.25, and there is no leakage. 4.2 Methods
42.1 The head is formed by cold processing, and shall not be formed by impact forming. If the head is hot pressed again, there shall be no burning phenomenon
4.2.2 The body thickness of the hot water cabinet refers to the difference between the maximum inner diameter and the minimum inner diameter measured on the simple section, which shall not be greater than the written design diameter
4.2.3 The minimum thickness of the hot water head after forming shall not be less than 90% of the design thickness. 4.2.4 When rolling the new body, it should prevent the occurrence of edge leakage, overbending, chain shape, bulging and other defects. The heat-bearing bearing body after assembly should not exceed 1.5 mm per meter. The total length should not exceed 2.5 mm. 4.3 Requirements
4.31 The welding of the hot water cabinet must be carried out according to the welding standards or short-term requirements issued by the welding department, and must be undertaken by the welder who has passed the examination. The welder's seal should be stamped before welding.
4.3.2 Before welding, the weldment should be fully cleaned of oxides, moisture, contaminants and other contaminants that may affect the weld. 4.3.3 Welding materials should be low-hydrogen type and selected according to the requirements of ZBL:4:0C5 for factory inspection. 4.3. When one of the following conditions occurs in the welding environment, welding shall not be carried out without effective removal. Wind speed is greater than or equal to m/s
b Relative humidity is greater than 00%;
,
,
CIB 456-92
4.3.5 When the temperature of the welded parts is lower than -0°C, the weld should be kept for 10 (1m) for preheating. 4.4 Requirements for weld seams
4.4.1 The weld surface should be uniform and dense, without cracks, nodules, flanks, dents and incomplete depressions. If there are any of the above defects, but not measured, they can be repaired.
4.4.2 The weld and the mother village should have a smooth transition.
4.4.3 The weld installation depth should not be greater than 0.5m m. The continuous length of the undercut should not be greater than 100mm. The length of the undercut should not exceed 10% of the continuous length.
4.4.4 The molten metal on the weld and the flying materials on both sides must be removed. 4.4.5 The thickness of the weld defects or mechanical damage parts after grinding and repair should not be less than the nominal thickness of the material minus the thickness of the steel. 4.4.6 The hot water welding is not allowed to have a chain. The internal separation between the sealing groove and the two cylinder sections shall not be less than 100mm
4.4.7 The commercial hot water cabinets shall be welded. If approved, the weld shall be inspected by X-ray. When the quality of batch-produced hot water cabinets can be guaranteed in terms of process, 11 units can be taken as a batch for X-ray inspection. 4.5 Material requirements 4.5.1 The body and sealing material of the hot water cabinet shall be made of stainless steel or cast iron. The technical requirements of stainless steel shall comply with the specifications of (B4327, and the requirements of cast iron shall comply with the provisions of Class B in GF 712. The incoming inspection of raw materials shall comply with ZB U4 ( 4.5.2 The steam heating pipe is made of pipe.
4.6 Assembly requirements
4.6.1 For hot water cabinets whose main body is made of killed steel, after the humidity reduction test is passed, the inner and outer surfaces shall be sterilized according to the coating material diagnosis requirements, and then coated with non-additive materials with a temperature resistance of not less than 80°C that have passed the inspection. 4.6.2 After the hot water cabinet passes the strength test and tightness test, the outer surface shall be derusted and coated with anti-rust paint and silver-colored topcoat. The outer surface is designed to have a thickness of = 40mm or ore, the thickness of the zinc-coated steel layer is 80.7mm. 4.6.3 The automatic regulator of the hot water tank should be able to automatically adjust to keep the water temperature of the hot water tank within the range of 60~70℃. 5. Test method
5. Appearance inspection
Check the appearance, material selection, accessories, size, etc. of the hot water tank. The results shall comply with 4.1.1, 4.1.3, 4.2.4.3.2, 4.3.3, 4.1.14. 4., 4.5, 4.6
5.2 Coal wall inspection
5-2.1 The welding test inspection content includes positive change test, reverse change test, welding cover fire must be transverse tensile test, visual test, fracture I organization inspection, etc. The welded test plate should be 100% X-ray inspection, and the film evaluation should be in accordance with the provisions of GB3323. The weld can be graded as qualified. 5.2.2 Each weld of the product should be 1% X-ray inspection, and the film evaluation should be in accordance with the provisions of GB3323. The weld is qualified. 5.2.3 When a small defect is found on the weld, it is allowed to be repaired. After the repair, an X-ray inspection should be carried out. The number of repairs on the same part should not exceed 2 times.
5.3 Strength test and tightness test
5.3.1 The hot water body is made and inspected, and a strength test must be carried out. The test method is in accordance with GB1103? The test results shall comply with the provisions of Article 4.1.5.
5.3.2 The heat exchanger can only be tested for tightness after the strength test is passed and the accessories are installed. The medium for the tightness test is water, and the test pressure is 1.25 times the design pressure. During the test, the test pressure is gradually increased, and the pressure is maintained for 20 minutes after reaching the specified test pressure, and then reduced to the design pressure. All the components and connections are inspected, and the results shall comply with the provisions of Article 4.3.5. CB 456--32
5.3:3 After the steam heating pipe is bent into shape and passed the final inspection, the strength test is carried out. The test method is carried out in accordance with Article GF11037, and the test results shall comply with the provisions of Article 4.1.6.
5.3.4 The steam heater can only be tested for tightness after the steam heating pipe strength test is passed and the accessories are installed. The test is carried out with clean water and the test pressure is 1.25 steam pressure, during the test, the test pressure is slowly increased, and the pressure is maintained for 20 minutes after reaching the specified test low pressure, and then reduced to steam pressure. All welds and joints are subjected to surge inspection, and the results are in compliance with the provisions of Article 4.1.6. 5.4 After the safety valve and the sealing test are completed, the safety valve is adjusted to the specified value, and the opening and closing tests are carried out. The pressure is set at the working pressure and the design pressure, and the sealing pressure is generally 0.85 of the working pressure, and the test is carried out three times in a row. The results shall comply with the provisions of Article 4.1.2. 5.5 Adjust the return overflow regulator in the hot water cabinet within the specified range, and sense the water supply temperature of the hot water cabinet. The results shall comply with the requirements of Article 4.6.3. The inspection regulations are as follows: 6.1! The hot water cabinets should be removed from the factory for inspection, and qualified stores can be compared with the factory. 6-2 Type inspection
Type inspection should be carried out for new products or products produced in transferred factories:
When the product design, ratio, and materials have major changes that are sufficient to affect its main performance; batch production is carried out once every four years
6.3 Factory inspection and type inspection shall be carried out in accordance with the provisions of Table 3. Table 3
Appearance inspection
Strength and comfort test
Education source
Two safety tests
Automatic temperature adjustment test
7 Marking, random documents, storage
Test classification
Type inspection
According to Article 5.3
According to Article 5.2
Compare with Article 5.4
Article 5.5
7.1 Each water heater is equipped with a corrosion-resistant plate fixed at its product position, and the following contents should be indicated on the nameplate. a.
Product name,
Manufacturer name:
Production route mark;
Actual pressure, MPa:
Design pressure, MPa:
Steam pressure MFa
Hot water temperature, m:
According to 4.3.5.1.7.6
According to 4.4.7
According to 4.1.2
According to 4.6.3
Volume, m
Manufacture number +
k, manufacture date,
Ship inspection mark.
7.2 Each hot water boiler shall be accompanied by the following documents:
General drawing,
b. Technical documents:
Output! Inspection quality guarantee
Ship inspection certificate.
7.3 Hot water plates should be stored in a dry place. Additional remarks:
CH456-92
This standard was issued by the 603 Institute of China Shipbuilding Industry Corporation. This standard was issued by the National Technical Committee for Standardization of Marine Machinery Auxiliary Boilers and Anti-pollution Technical Committee. This standard was drafted by the 603 Institute of China Shipbuilding Industry Corporation and Hudong Shipyard. The main drafters of this standard are Zhong Chongxin, Xia Yankun and Ling Zhongqi. 26--997
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