This standard specifies the product classification, technical requirements, inspection rules and markings of ship bottom suction grilles. This standard is applicable to ship bottom suction grilles for all types of ships. CB/T 615-1995 Ship bottom suction grilles CB/T615-1995 Standard download decompression password: www.bzxz.net

Ship Industry Standard of the People's Republic of China
CB/T 615-1995
Bottom Suction Grilles
Published on 1995-12-19
Published by China State Shipbuilding Corporation
Implemented on 1996-08-01
Ship Industry Standard of the People's Republic of China
Bottom Suction Grilles
Subject Content and Scope of Application
This standard specifies the product classification, technical requirements, inspection rules and markings of bottom suction grilles. This standard applies to bottom suction grilles for various types of ships. 2 Product Classification
2.1 The types and nominal diameters of bottom suction grilles shall be in accordance with Table 1. Table 1
Rectangular strip suction grille
Circular strip suction grille
Circular drilled suction grille
Rectangular drilled suction grille
Corresponding to the nominal diameter DN of the sea valve
100~500
50~200
100~200
2.2The structure and basic dimensions of type A suction grille shall be as shown in Figure 1, Figure 2 and Table 2. China State Shipbuilding Corporation approved CB/T615--1995 on December 19, 1995
Classification number: U55
Replaced CB＇615·77
Scope of application
Seagoing vessels, river vessels
Implemented on August 1, 1996
Cut according to hull line shape
CB/T615--1995
Minimum size after assembly with hull
DN100 ～200A-type
grating;3--stud;4--hexagonal nut;1-grating seat;2
5--small hexagonal flat nut;6--double-ear stop washer;7--cap nut9
sea valve
cut according to the hull line
minimum size after assembly with the hull
CB/T615
5-1995
Figure 2DN250~500A-type
1-grating seat; 2-grating; 3-stud; 4--hexagonal nut; 5-small hexagonal flat nut; 6-double-ear stop washer; 7-cap nut; 8-pin; 9-cotter pin; 10·washer table 2
grating seat
pin bolt
hull opening
L×B×R
178×262×50
220×310×50
230×410×60
310×4 62×60
384×574×80
504×640×80
550×764×80
620×896×100
680×1020×100
690×1204×100
Area ratio
CB/T615—1995
2.3The structure and basic dimensions of Type B suction grille shall be as shown in Figure 3 and Table 3. Cut according to hull line
\Minimum size after assembly with hull
1-Grille seat; 2--Grille; 3-Stud: 4-Hexagonal nut; 5---Small hexagonal flat nut; 6--Double-ear stop pad Figure: 7 Cap nut
Sea valve
Grille seat
Hull opening
Area ratio
CB/T6151995
2.4The structure and basic dimensions of C-type suction grille are as shown in Figure 4 and Table 4. According to the hull line type
Minimum size after assembly with the hull
1--Grille seat; 2---Grille; 3-Double ear stop washer: 4-Hexagonal nut; 5-Hexagonal bolt Table 4
Sea valve
Grille seatbzxz.net
Hull opening
Area ratio
CB/T6151995
2.5The structure and basic dimensions of the D-type suction grille are shown in Figure 5 and Table 5. According to the hull line type
Minimum size after assembly with the hull
1Grille seat; 2Grille; 3Hexagonal nut: 4Double ear stop washer; 5Hexagonal bolt Table 5
Sea valve
Grille seat
Note: ①B-type and C-type suction grilles can only be manufactured according to order requirements (installed in the bell pipe). ② If the H dimension needs to be increased during selection, the required dimension of H can be indicated in the mark. 2.6 Marking example:
Rectangular strip suction grille with a nominal diameter of 100mm for sea valve: Suction grille A100CB/T615—1995
Hull opening
L,XBXR
270×350X40
350×470×40
350×670×40
430X950X40|| tt||Round strip suction grille with a sea valve diameter of 200mm and a grille seat height H of 100mm: suction grille B200-H100CB/T615—1995Suction grilleRound drilled suction grille with a sea valve diameter of 65mm: suction grille C65CB/T615—1995
Area ratio
Technical requirements
The materials of the main parts of the suction grille shall be as per Table 6. Parts name
A, B type studs and nuts
A type pins, bolts
, I) type bolts
Double single lock washers
Grille seat and grille
(, D) type nuts
CB/T615-1995
Aluminum bronze
Carbon steel
Carbon steel
QA19- 2
Q235-A
Q235-A
GB5234—85
GB700---88
GB700--88
3.2A and B type grilles and grille seats must be hot dip galvanized, and their thickness shall not be less than 430g/m2; C and D type grilles and grille seats shall be hot dip galvanized, and the thickness may be appropriately thinner than that of A and B types.
The grilles shall be fixed with bolts and the bolt tails shall be sealed with epoxy. Inspection rules
Each grille shall be inspected by the manufacturer's technical inspection department for the materials, dimensions and appearance used before leaving the factory, and a certificate of conformity shall be issued. Markings
The grille shall have the following markings:
Manufacturer's mark;
Product mark;
Inspection pass stamp.
Additional Notes:
This standard was proposed by the Pipeline Technical Committee of the National Technical Committee for Standardization of Marine Machinery. This standard is under the jurisdiction of the 603 Institute of China State Shipbuilding Corporation. This standard was drafted by the 708 Institute and 603 Institute of the 7th Research Institute of China State Shipbuilding Corporation. The main drafters of this standard are Wang Yaping, Zhang Fuming and Wu Shaozeng.
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