DNV DNV-CP-0255 [ Active ]

Scope and application

This programme is applicable for the approval of material manufacturers of:

— Wire ropes,

as referred in the Society's rules and standards. For a description of general requirements, conditions and procedures related to the approval, please refer to DNV-CP-0346 which shall be applied in combination with this programme.

The product(s) used for approval testing (see Sec.3) will place limitations on the range of approval. The approval will be limited to:

— wire rope type

— wire rope construction

— maximum wire rope diameter

— core construction (i.e. fibre, steel etc.)

— lay type

— lay direction

— breaking load of the wire rope

— tensile strength grade of the wires of the wire rope

However, test data supplied for one construction may cover wire ropes of other constructions in the same wire rope class (for definition of classes, see API 9A), provided tested and covered constructions have:

— same type of core

— same type of lay type and direction

— same wire shape, grade and finish

— same number of strands

— same construction type (see ISO 17893 Table 2), defined as follows:

— single lay types

— parallel lay types, divided as follows:

— seale

— warrington

— filler

— combined parallel lay (WS) types

— multiple operation lay types, divided as follows:

— cross lay

— compound lay.

Approval will be given for the manufacture of products and materials in accordance with the Society's rule requirements. However, in case of absence of relevant rules and subject to prior agreement, approval may be given for the manufacture of products and materials specified in recognised standards.

Starting material/semi-finished steel products shall be produced at works approved by the Society.

— when wire rope manufacturer operates their own steel making and/or rolling facilities to produce their own pre-material (wires/billets/ingots etc.), the manufacturer shall also use separate approval programmes DNV-CP-0242 or DNV-CP-0243 to approve these facilities, as appropriate.

— when pre-materials for wire rope making are not produced by the wire rope manufacturer, these shall be procured from steelmaker/rolling mill correspondingly approved by the Society.