CB/T 3758-1995 Cargo Hook Block CB/T3758-1995 Standard Download Decompression Password: www.bzxz.net

Shipbuilding Industry Standard of the People's Republic of China
CB/T3758—1995
Cargo Hook Block
Published on 1995-12-19
Published by China State Shipbuilding Corporation
Implemented on 1996-08-01
Shipbuilding Industry Standard of the People's Republic of China
Cargo Hook
Subject Content and Scope of Application
CB/T37581995
Classification Number: U24
This standard specifies the product classification, technical requirements, test methods and inspection rules of shipboard cargo hook blocks (hereinafter referred to as blocks). This standard applies to shipboard cargo hook blocks. 2 Product Classification
2.1 Blocks are divided into Type A hook blocks and Type B hook blocks according to the different types of hooks used with them. The structural type and basic dimensions of 2.2A type hook block shall be in accordance with Figure 1 and Table 1. The structural type and basic dimensions of 2.3B type hook block shall be in accordance with Figure 2 and Table 1. Approved by China State Shipbuilding Corporation on December 19, 1995, implemented on August 1, 1996
CB/T3758-1995
1-A type hook; 2-cross pin; 3-fork; 4-cross beam; 5-one-way thrust ball bearing; 6-hook nut; 7-taper pin; 8-pulley; 9-single row tapered roller bearing; 10-adjustment ring; 11-oil cup; 12-pulley shaft; 13-guard plate; 14-hexagonal channel bolt; 15-spring washer: 16-spacer pin CB/T3758-1995
1B type hook: 2-cross beam; 3-one-way thrust ball bearing; 4-hook nut; 5-taper pin 6-pulley: 7-single row tapered roller bearing; 8-adjustment diagram; 9-oil cup; 10-pulley Axle; 11—guard plate: 12 hexagonal bolt: 13—spring washer: 14-spacer pin Rated
Safe working
Lifting capacity
10.0(1.0)
Applicable steel
Maximum rope
116.0(1.6)
5.0J25.0(2.5)
10.050.0(5.0)
Marking example
CB/T3758—1995
Type A hook pulley with safe working load of 10.0kN Pull A10.0CB/T3758--1995
3 Technical requirements
Material of main parts of pulley shall be as specified in Table 2.
Parts name
Hook nut
Pulley shaft
Pulley body
High-quality carbon structural steel
Ordinary carbon structural steel
Cast pot or ductile iron
3.2 The raw materials entering the factory should have a certificate of conformity. B
Q235-A
ZG 230-450bZxz.net
or QT500-7
M22×15
M33×2
Mass,kg
123.3120.0
Standard No.
GB 69988
GB 700—88
GB 5676--85
or GB1348—88
3.3 The surface of metal parts shall be free of defects such as burrs, cracks, rust, etc. that affect strength, and the outer sharp edges of parts shall be rounded. 3.4 The machined surface of castings shall not have defects such as sand holes, pores, shrinkage holes, cracks and looseness, and the non-machined surface shall not have defects that affect strength. 3.5 The surface of forgings (including hooks) should be smooth and should not have burrs, cracks, folds, overburning and defects that reduce strength. Welding repair is not allowed for defects. Forged parts must be normalized. 3.6 The pulley shaft must be tempered and its hardness is HB217~255. 3.7 The exposed surface of the pulley should be painted, the surface of the pulley rope groove should be painted with varnish or silver powder paint, and the non-processed surface should be painted with primer and topcoat; before painting, all parts should be cleaned and painted evenly, without defects such as paint leakage, bubbles, shrinkage and shedding, and the friction surface should be coated with lubricating grease. 4
CB/T3758-1995
3.8 After the pulley is assembled, check the pulley, fork, hook and other movable parts. The rotation must be flexible and there must be no jamming. 3.9 After the pulley is assembled, a static load test should be carried out, and the test load is 4 times the safe working load. Test method
The static load test shall be carried out according to the test load and loading method specified in Table 3. The test load time shall not be less than 5min. After unloading, check each load-bearing component. No permanent deformation or any defects shall occur. The movable components shall rotate flexibly. Table 3
Test loading method
Safe working load, kN
Test load, kN
5 Inspection rules
Each block must be inspected by the product quality inspection department of the manufacturer in accordance with the requirements of this standard. After the product passes the inspection and is verified by the ship inspection department, it can be shipped out of the factory and a product certificate of conformity shall be issued. 6 Marking, packaging, storage
6.1Each block shall have a product label, which shall indicate the following: a.
Product name;
Product mark;
Safe working load;
Maximum diameter of the steel rope;
Manufacturer name or mark, date of manufacture. 6.2 Each block shall be marked with a ship inspection mark on the shell. 6.3 Packaging and storage
The product packaging must be firm, moisture-proof, and able to meet the requirements of multiple loading and unloading and long-distance transportation. The block must be stored in a ventilated and dry room.
Additional instructions:
This standard is proposed by the National Technical Committee for Ship Bottle Standardization. This standard is under the jurisdiction of Jiangnan Shipyard.
This standard was drafted by Jiangnan Shipyard, Guangdong Chaoyang Ship Parts Factory, and Changshu Hoisting Machinery Factory. The main drafters of this standard are Zhang Songying, Tong Zirong, Xie Maocong, Zhou Qinting, Jiang Huigang, and Shen Maolin.
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