This standard specifies the technical requirements and test methods for the manufacture of pressure hull structures for submersibles and underwater devices. This standard is applicable to the manufacture of steel pressure hull structures for submersibles, underwater devices and deck pressure tanks with a pressure of no more than 9.81MPa. The pressure hull structure of the diving simulation chamber can also be used as a reference. GB 11631-1989 Technical requirements for the manufacture of pressure hull structures for submersibles and underwater devices GB11631-1989 Standard download decompression password: www.bzxz.net

TDC 629.T27.011.7
National Standard of the People's Republic of China
1163189
Technical specifications for manufacture of pressure hull structure for submersibles and underwater equipment
Published on September 21, 1989
Implemented on April 7, 1990
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Technical specifications for manufacture of pressure hull structure for submersibles and underwater equipment tnbmcralblesaidandcrwatercoalpments
1 Safety and scope of application
GE1163189
This standard specifies the technical requirements and test methods for the pressure hull structure of submersibles and underwater devices. This standard is applicable to the pressure-resistant hull structure of submersibles, underwater devices and decks with pressure less than 9.MP. It can also be used as a reference. 2. Standards GB11632 Technical conditions for pressure vessels and water tanks GB8323 Radiographic quality classification of steel olefin welded butt joints B6654 Carbon strip and low alloy steel thick plate for pressure vessels JBT11 Welding pressure vessel technical software GB1152 Testing of pressure vessel butt joints 3 Technical requirements 5-1 Materials for pressure vessels must meet the requirements of GB11632 and GB6654. 3.2 Processing and assembly 3.2.1 Steel processing 3.2.1.1 Cutting surface and installation surface must be kept clean and free of cracks, defects such as 3.2.1.2 The difference between the line and the marking line shall not exceed 5mm, and the depression of the steel part in the line area shall not exceed 2mm. 3.2.1.3 Each steel seat shall have a clear mark, 3.2.2 Hot and cold type
3.2.2.1 Shaped body welding layout
It is a hemispherical shape formed by butt-jointing three symmetrical steel plates. The distance between the weld and the center line of the spherical shell shall be less than .25% of the nominal height diameter of the sphere.
If the original plate is used, its layout shall comply with the provisions of 3.2.2.2 Shaped body welding
The distance between the longitudinal weld of two adjacent circular shells or the end point of the spherical head weld and the adjacent surface column shall not be less than 100mm. 5.2.2.3 Process requirements
The hot and cold forming of steel plate profiles shall comply with the hot and cold processing process requirements of the selected chain type, and the National Technical Supervision Bureau approved it in 1989-D9-21 and implemented it in 19900401.
3.2.2.4 The thickness of the shell after forming shall be filled Allowable thinning plate G11631-89
molding sheet, the minimum thickness of the flow cabinet shall not be less than the design specified thickness 3.2.2.5 Steel butt joint allowable misalignment
Pressure-resistant parts structure Na plate butt joint allowable fin reverse or press the table. Absolute metallurgy
Reading time holding
12·-20
≥>20--50
3.3.1 Selection environment
Ring butt joint|| tt||3.3.1.1 Before welding, the weld zone should be cleaned of waste, oxides, grease and other contaminants, and polished with a grinding wheel to eliminate rough molten flow. 3.3.1.2 The welding area should be equipped with anti-reinforcement and windproof facilities. 3.3.1.3 When the weldment is lower than the specified low temperature, it should be preheated before welding in the baking area. For 12Ni8CrMoVA) steel, the interlayer temperature should be maintained regularly: 3. 3. 2 Appearance of welds
3.3.2.1 The weld is dense, even and smooth, and the weld shows good molten metal. 3.3.2.2 The weld and weld surface are free of defects such as cracks, pores, slag and rust. 3.3.2.3 The weld depth shall not exceed 0.5m, and the continuous weld length shall not exceed 100m. The total length of the weld shall not exceed 5% of the total length.
3.3.3 Precautions for weld defects
3.3.3-1 There are no permitted defects on the weld. When there are defects, they should be repaired according to the regulations to eliminate the defects. 3.3.3.2 The same part should be repaired after two times of welding. If the defects are not repaired after two times, they can be repaired again, which must be approved by the technical director of the new light industry.
3.3.3.3 The pressure-resistant shell should be repaired before the heat treatment, or after the heat treatment. The original treatment requirements must be followed. The new work should be handled.
3.3.3.4 After the welding process, the specified parts near the welding chain should be marked with a second welding period stamp. 3. 4 Heat treatment
5.4.1 Steel and stainless steel pressure shell
When the thickness of the plate is more than 20mm, it is allowed to carry out local heat treatment, but it is necessary to ensure that the entire length of the weld is heat treated. The specific requirements of JD741 are used.
3.4.2 Alloy steel pressure shell
1DCrSINiCu, 12N3CtMoV steel before hot forming. The treatment process is carried out according to the specified process. If it is cold formed, the above technical requirements are selected.
3-5 Weld chain inspection
3.5.1 Inspection time
After the pressure body weld passes the appearance inspection, it should be inspected without damage, and the non-destructive deep damage inspection should be carried out after welding or heat treatment. 3-5.2 Inspection Standards
GB 11631-89
3.5.2. Pressure-resistant butt welds with a thickness greater than 12 mm must be inspected by 10% radiographic or ultrasonic flaw detection. 3.5.2.2 Full penetration fillet welds on pressure-resistant shell materials must be inspected by 100% radiographic or ultrasonic flaw detection. 3.5.3 Flaw Detection Assessment Standards
3.5.3.1 The radiographic flaw detection of welded joints shall be assessed in accordance with GB 3323 for longitudinal welds and circumferential welds. 3.5.3-2 Ultrasonic testing of welds shall be evaluated according to B1152. Grade 1 welding and grade II welding are qualified. 3.5.3.3 For the fence, penetration and head of the pressure-resistant body and the friction welding of the steel column, the radiographic test grade is acceptable; the ultrasonic fatigue test grade is qualified.
3.6 Structural tolerance
3.6.1 Radiographic body
36.7.1 The allowable deviation of the total length of the pressure-resistant shell is ±1Dmm. 3.6.2.2 The allowable deviation of the spherical roundness and cylindrical roundness of the pressure-resistant shell is determined according to formula (1), W,=± 0.006 3.6.1.3 The allowable deviation of the pressure-resistant body is determined by formula (2), 0.01 L. The allowable deviation of the local thickness of the shell is determined by formula (2), 0.01 L. The allowable deviation of the local thickness of the shell is determined by formula (3):
The allowable deviation of the pressure-resistant body is determined by formula (4):
L = 1.15 VtV/R wwW.bzxz.Net
Middle bone distance, mm
1—— Plate thickness, mm.
3.6.2.1 The allowable deviation of the pressure-resistant body is determined by formula (5), W± D.005 R
W——allowable deviation of the bone circle + mm: R——nominal inner (or outer) strength of the bone, mm. 3.6.2.2 The vertical deviation of the bone lumbar plate shall not exceed 3 times the membrane height. 36.2.3 The deviation of the length of the auxiliary bone shall not exceed 5mm within a length of 1m. 36.2.4 The deviation of the T-type front bone plate shall not exceed 5% of the wing width. 3.6.2.5 The distance between two adjacent bone rings shall not exceed 2mm. 4 Test method
4. General provisions of the test
4.1:1 The installation and connection work of the parts must be completed, and the quality and complete acceptance will be carried out after the qualification. 1.2
-( 5)
4.1.2 The test instruments shall be calibrated by the metrology department and the range of the pressure gauge shall not be greater than 1.5 times the test pressure.
GB11831-89
4.1.3 The pressure of the nacelle shall be measured before the test. 4.1.4 Before the test, a low-pressure gas penetration test should be conducted in advance to check the tightness of the seal and structure. The test pressure is 0.1~..3MPu, and the maximum leakage allowed through the blockage is 1 hour.
4.1.5 When the pressure-resistant shell is decompressed, resistance strain measurement should be carried out. 4.1.6 During the test, the water content should be kept above 1 °C, and the ambient temperature should be kept above 1 °C. 4.1. If the organic element is tested together with the pressure shell, the test medium temperature should be at least lower than the design temperature of the organic glass window.
4.1.8 The test must be carried out continuously. It is strictly forbidden to stop the test and check when the structure has been subjected to stress. 4.1. If the structure or welding is found to be defective during the test, it is not allowed to collapse under the pressure state of the structure. 4.1.10 After the test, the pressure body should be measured, and the error should not exceed the provisions of Article 3.6. 4.2 Micro-pressure test
Check the strength and tightness of the pressure-resistant filling when it is subjected to static pressure. 4.3 Micro-pressure test
The external or internal test pressure of the pressure-resistant shell structure subjected to external pressure or internal pressure is determined according to the formula (). P-1.25 P
Where: Pt~= pressure, MPa,
P=maximum allowable working pressure MPa
4.4 Hydraulic test method
4.4.1 Test preparation
Before the initial pressure test, a comprehensive check is made on the test structure, test equipment, required tools, and safety measures. 4.4.2 Internal surge pressure test
4.4.2.1 The pressure is carried out in stages, and each stage is increased by 0.1 or more, and then gradually increased to 1 month. (6)
4.4.2.2 During the test, the time for maintaining pressure at each pressure stage shall be determined when necessary for inspection and record keeping, and shall generally be no less than min. The time for maintaining pressure at the end of the test shall be no less than ih.
4.4.2.3 During each pressurization stage, the pressure hull structure and load shall be carefully inspected and recorded. 4.4.2.4 The decompression procedure shall be the same as the pressure procedure, and the pressure test shall be conducted by the pressure test engineer. 4.4.2.5 After the test, the pressure hull structure shall be fully inspected. 4.4.3 External port pressure test
4.3.1 The external pressure test can be carried out within the pressure test area or in the designated sea area. 4.4.3.2 The pressure test shall be carried out in stages, and the pressurization stages shall be the same as those specified in 4.4.2.1. 4.4.3.3 During the test, the pressure holding time of each pressure stage is the same as that of 4.4.2.2. 4.4.3.4 The decompression cycle is the same as that of 1.4.2.4. 4.4.3.5 After the test, the pressure hull structure shall be inspected. 5 Quality Certificate
5.1 According to the inspection results of the product standards and diving system and "Specifications for Classification and Construction of Submersibles", "Specifications for Classification and Construction of Steel Submarine Frames", the quality inspection department shall fill in the product quality certificate. 5.2 The quality certificate of the refractory shell structure shall include the following contents: a. The chemical composition and mechanical properties of the pressure hull material, b. The welding quality inspection results, d. The quasi-pressure test results and report: d. The weight of the refractory shell structure does not meet the requirements of the drawings. Additional remarks: This standard is proposed by China Shipbuilding Industry Corporation. GB11631-89 This standard is under the jurisdiction of the Submarine Ship Subcommittee of the Shanghai Shipbuilding Industry Corporation. The technical standard is drafted by the 71st Institute of the 7th Institute of the China Shipbuilding Industry Corporation and the 719th Research Institute. The drafters of this standard are Sun Xin, Chan Junqing, and Feng Shizeng Sun Zhidao.
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