title>GB/T 11789-1989 Ropes and rope products - Equivalence between natural fiber ropes and chemical fiber ropes for mooring ships - GB/T 11789-1989 - Chinese standardNet - bzxz.net
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GB/T 11789-1989 Ropes and rope products - Equivalence between natural fiber ropes and chemical fiber ropes for mooring ships
Basic Information
Standard ID:
GB/T 11789-1989
Standard Name: Ropes and rope products - Equivalence between natural fiber ropes and chemical fiber ropes for mooring ships
This standard provides an equivalence table of certain natural fiber ropes and chemical fiber ropes for mooring ships. This standard applies to these ropes specified in the following national standards and professional (departmental) standards. GB8050 Characteristics of three-strand and eight-strand polypropylene monofilament or film ropes GB/T11786 Three-strand polyamide multifilament ropes GB/T11787 Three-strand polyester multifilament ropes SC12 white brown rope GB/T 11789-1989 Ropes and rope products Equivalence between natural fiber ropes and chemical fiber ropes for mooring ships GB/T11789-1989 Standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China Ropes and cordage products Equivalence between natural fibre ropes and man-made fibre ropes for use in the mooring of vessels This standard refers to and adopts the international standard 1S03505-1975 "Ropes and cordage products-Equivalence between man-made fibre ropes". GB/T11789-89 -Natural fibre ropes and man-made fibre ropes for use in the mooring of vessels This standard only deals with ropes for mooring, and towing issues have not been studied. Despite this limitation, the following equivalence table can serve as a guide for rope users until more complete information on towing issues is available. Subject content and scope of application This standard provides an equivalence table for certain natural fibre ropes and man-made fibre ropes for use in mooring vessels. This standard applies to these ropes as specified in the following national standards and professional (departmental) standards. GB8050 Characteristics of three-strand and eight-strand propylene monofilament or film ropes GB/T11786 Three-strand polyamide multifilament rope GB/T 11787 Blue polyester multifilament rope SC 12 white brown rope 2 Equivalency table between natural fiber ropes and chemical fiber ropes (recommended minimum values) For factors to be noted when listing the equivalence table between natural fiber ropes and chemical fiber ropes, see Appendix A (supplement). White hemp rope Special grade Nominal diameter Line density Manila hemp rope First grade ISO 1181-1973 Reference diameter State Administration of Technical Supervision 1989-11-06 approved polyamide rope Superior gradeWww.bzxZ.net GB/T 11786 ISO 1140-1976 Reference diameter Superior grade GB/T 11787 ISO 1141-1976 Reference diameter Polypropylene rope Superior grade GB8050 IS0 1346-1975 Reference diameter 1990-07-01 implementation GB/T 11789--89 Appendix A Factors to be noted in the comparison table between natural fiber ropes and chemical fiber ropes (Supplement) Chemical fiber ropes are currently widely used for mooring and towing of ships. Chemical fiber ropes have superior properties to natural fiber ropes, with high strength and great ability to absorb energy under impact loads. Simply providing chemical fiber ropes with the same breaking strength to replace natural fiber ropes is not satisfactory. The following main factors need to be considered when listing the equivalence table between natural fiber ropes and chemical fiber ropes: If a chemical fiber rope of the same strength is used to replace a natural fiber rope, the rope diameter will be very small. Because of the smaller cross-sectional area, the rope will lose a higher part of its strength during use due to wear, abrasion, cutting and other forms of surface damage caused by friction with external objects. When the deck equipment used is not specially designed for chemical fiber ropes, it may cause excessive wear and breakage; the high elongation and recovery characteristics of chemical fiber ropes under load will cause internal wear between the rope strands; some chemical fiber ropes are damaged by melting due to frictional heat; d. Most chemical fiber ropes lose strength when heated, especially polyolefin ropes covered in this standard, mostly depending on the relationship between the operating temperature and the melting point of the material. 1. As for polyamide ropes, there is some loss of strength when wet; &. All textile fibers lose strength when exposed to sunlight. This effect depends on the type of fiber, the cross-sectional area of the rope, the geographical location of use, the exposure time and the amount and type of stabilizer used; h. In case of rope breakage, the released energy will cause high-speed rewinding, which will be dangerous to people. Due to the hysteresis effect, the energy absorption capacity of all ropes will be reduced once they are used. Additional remarks: This standard is proposed by the Ministry of Textile Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Research Institute of the Ministry of Textile Industry. This standard is drafted by China Textile University and jointly drafted by Shanghai Textile Standard and Metrology Research Institute, Shanghai Wire and Belt Industry Company, and Shanghai Cable Factory. The main drafters of this standard are Li Yongchun, Hui Yinqiu, and Zhou Xiangshu. 100 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.