2014年5月20日星期二

About Wire Rope

Definitions,Designation and Classification
The new European Rope Staedards EN 12385-2(with the above title), EN 12385-5(Stranded Ropes for Lifts) and EN 12385-1(General Requirements) show some new requirements,we have to learn to come along with.
F.i. in the certificate,which has to accompany the rope delivery,it is required,to comply for the rope delivery,it is required to comply for the rope designation with the symbols,laid down in EN12385-2. These symbols-derived from English words are the same for all European deliveries.

Symbols for rope cores
FC=   fibre core
NFC=  natural fibre core
SFC=  synthetic fibre core
IWRC= independant wire rope core
PWRC= parallel laid full steel rope

Symbols for strand construction
S=   strand construction Seale
W=   strand construction Warrington
F=   strand construction Filler or Filler Wire
WS=  strand construction Warrington-Seale
M=   strand construction Crosslay
You can order as accustomed. Especially our Special Ropes are to be ordered as in the past by their name.

Rope class
So far each rope construction is governed by rope standards. In the new rope standards similar rope constructions in so-called rope class are aummarised,e.g. the rope constructions 6x19 Seale, 6x19 Warrington and 6x19 Filler in the rope grade 6x19. The rope standards contain tables with the technical data of the common rope grade.

Rope tensile strenth grade
For ropes acc.to EN12385-5 the rope grade adresses the nominal tensile strength grades of the outer and inner wires of the rope. Additionaly, the rope grade defines the minimum breaking strength of this rope. Rope grade 1570(without the unitN/MM2) means,that all wires of this rope are of the nominal tensile strength grade 1570N/mm2. Rope grade 1370/1770 means, that this is dual tensile rope(term of ISO4344)and the inner wires of the rope are of 1770N/mm2 nominal tensile strength grade.

Symbols for wire finish
U= bright(from uncoated)
B= galvanized acc.class B

Symbols for type of lay
sZ= right hand ordinary(or regular) lay
zS= left hand ordinary(or regular) lay
zZ= right hand lang lay
sS= left hand lang lay

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