CB/T 3921-2001 Marine auxiliary boiler manhole device CB/T3921-2001 standard download decompression password: www.bzxz.net

ICS 47. 02. 20
Registration No.: 9835-2002
Ship Industry Standard of the People's Republic of China
CB/T3921—2001
C/T9211999
Manhole unit fur marine auxiliary boiler2001-11—15 Issued by: Commission of Science, Technology and Industry for National Defense Issued by: Commission of Science, Technology and Industry for National Defense Implementation on: 2002-02-01 CB/T3921-2001 This standard is a revision of 3/T392-999 for protective equipment 3/T3921-1921. It is based on the "Notice on the Transformation of Professional Standards into National Standards after Revision" issued by the State Administration of Standardization and the "Notice on the Adjustment of the Professional Standards and Relevant National Standards into Industry Standards" issued by the State Administration of Standardization and the "Notice on the Adjustment of the Professional Standards and Relevant National Standards into Industry Standards" issued on June 4, 2001. Compared with CB/T3921-2001, this standard has the following changes: 1: It clarifies the The applicable scope of the standard is the estimated pressure not more than 2.FYM, and the medium is water and steam. The manhole is supplemented with reinforced materials. 3; the original flat coal special material No. A3 is changed to QS5A: the original material brand No. 30 or 35 is changed to 235-, and the "dangerous drawing, pressure correction, hot waist, and fire correction" are cancelled. 1) The original brand A3 is changed to Q235-A: the original brand A3 of the plate and pad is changed to Q235-A: the original material brand No. 30 or 35 is changed to Q235-A: the material brand No. 3 or 3 is changed to 233-, the temperature is 400 °C, and the warehouse is non-standard steel. The core clause in the original standard is cancelled.
This standard shall come into effect on the date of implementation (R/9-1-1. This standard is a temporary standard for the use of air-conditioning equipment. The ... |tt||Marine auxiliary boiler manhole device
This standard specifies the classification, cost requirements, test and acceptance of ship auxiliary boiler manhole devices. This standard applies to manholes with a design pressure of 5M or less, and is for the design, manufacture and acceptance of auxiliary boiler manhole devices for steam.
2 Reference standards
The following standards contain provisions that have been made into standard provisions through inclusion in this standard. When this standard is revised, the versions shown are all valid: All standards will be revised: All parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T655-1555 High-quality carbon structural steel
Family structural steel
GB/T 700-1988
GB/T 985-1988
Basic types and sizes of manual electric welding to gas shielded weldingGR/T 986-1988 Basic types and sizes of welding joints for welding GB/T1168-1576 Flame retardant parts
GB/T3098.2-2000 Mechanical properties of fasteners - bolts, nails and screwsGB/T3098.2-2000 Mechanical properties of fasteners - threads, teeth and screwsGL/T 5779. 1 2000
Surface defects of fasteners - screws, screws and mounting hardware
GB/T 5779.2-2UU
GB/T[1037-2000 Marine auxiliary boilers and containers strength and tightness test methods China Super Society materials and welding specifications 1998 edition China Classification Society 3 Classification
CR/T39212001
3.1 For manhole cover without chain, anti-purchase Figure 11 people without, 2-room reading around, - rope: 1 strong figure: 5 connection: 6, 7 forbidden figure: 5 end mother
3.2 R type hinged manhole bag retention, purchase see Figure 2CE/3921
1 called channel installation 2. Manhole: shoulder: 1-movement, 5-addition: 6-itching: 7-worry: 8-reading: pregnancy
CB/T3921
3.3 The main dimensions of the manhole installation shall comply with the provisions of Table 1. Table 1
School size
Period of production
363280
4G9:500
63X320
425×320
Note: Strengthen the design decision
3.4 ​​Marking example
$s0: 240
The main dimensions of the manhole installation shall comply with the provisions of Table 1. Table 1
School size
Period of production
363280
4G9:500
63X320
425×320
Note: Strengthen the design decision
3.4 ​​Marking examplebzxz.net
$s0: 240
The main dimensions of the manhole installation shall comply with the provisions of Table 1! : Manhole device 400×300C month/322[-2004 requirements
4.1 Village material - generally consider the table 2 double requirements.
Suspension channel installation crown, fan iron ugly, no pregnancy, this insurance, class annual temperature table screw selection
diagram, man
best connection bolt
average diameter
4.2 The range of manholes should be made according to the standard circle drawing method. c
GA/-730
GB/T 699
Grade design pool
135-B/1 700
Heat-resistant dense material core design
Pressure as the range
4.3 Welding joint size shall comply with (3/5, B as the starting point except for the neutral indication in the drawing. 4.4 Manhole installation reinforcement diagram cover width shall be not less than 12.%m$
4.5 The surface of the manhole cover shall be more than a2.0% and shall not have defects such as scratches, gas marks, burrs, etc.
1. The butt welding part of the white drive diagram shall be polished, and the inner bag at the outer end must be inverted. 4.7 If the manhole and the reinforcement diagram are inverted, the total angle and agent shall not be allowed. 4. 8. For example, the technical requirements of the fuel tube should be in accordance with GB/T3098.1, CB/T579.1, GB/T16, /T 30982, CR/T799.2.
5 Test and acceptance
5.1 The main size requirements of the manhole installation should be accepted according to the requirements of this standard. 5.2 The filter pressure test of the manhole installation should be carried out according to the requirements of GB/T11087.
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