API Spec 9A pdf free download
API Spec 9A pdf free download.Specifcation for Wire Rope.
4.1.3 Lubricant Lubricants shall conform to ISO 4346. 4.2 Rope Manufacture 4.2.1 General In stranded ropes, all the wire layers in a strand shall have the same direction of lay. The lay lengths of corresponding wire layers in strands of the same size, construction, and strand layer shall be uniform. The core of a stranded rope, except for compacted (swaged) ropes, shall be designed (steel) or selected (fber) so that in a new rope under no load there is clearance between outer strands. The rope ends shall be secured such that they are prevented from unlaying. 4.2.2 Wire Joints Diameters shall be continuous, but, for wires other than well-measuring wires, if joints are necessary in wires over 0.4 mm, they shall have their ends joined by brazing or welding. For stranded ropes, the minimum distance between joints within one strand shall be 18 × rope diameter (d). For spiral ropes, the minimum distance between joints in any wire layer shall be 36 × diameter of the wire layer. Wires up to and including 0.4 mm may be joined by twisting or by ends being simply inserted into the strands’ formation. 4.2.3 Preformation and Postformation Stranded ropes shall be preformed or postformed, or both, unless specifed otherwise by the purchaser. NOTE Some parallel-closed ropes and rotation-resistant ropes may be nonpreformed. 4.2.4 Construction The rope construction shall be either one of those covered in Annex C or as stated by the manufacturer. The constructions of compacted strand wire ropes, compacted (swaged) wire ropes, large diameter (i.e. over 60 mm) stranded ropes, and spiral ropes (i.e. spiral strand and full-locked coil), shall be stated by the manufacturer. Where only the wire rope class is specifed by the purchaser, the construction supplied shall be stated by the manufacturer. For well-servicing strand, the construction shall be either 1 × 16M or 1 × 19M or as stated by the manufacturer.4.2.5 Rope Grade The wire rope grades for the more common classes and sizes of stranded ropes shall be as given in Annex C. Intermediate grades may be supplied by agreement between the purchaser and the manufacturer or supplier. NOTE Not all wire ropes (e.g. large diameter stranded ropes and spiral ropes) will necessarily have a nominated rope grade. 4.2.6 Wire Finish The fnish of the wires shall be uncoated (bright), zinc-coated class B, or zinc-coated class A. For wire ropes of bright wire fnish, substitution of bright wires by zinc-coated wires shall be limited to inner wires, center wires, fller wires, and core wires. For ropes of zinc-coated wire fnish, all the wires shall be zinc-coated, including those of any steel core. Where zinc-coated is specifed, this may also include zinc alloy Zn95/Al5.4.4 Lay Length For single-layer ropes of 6 × 7 class, the length of lay of the fnished wire rope shall not exceed 8 × rope diameter (d). For other single-layer ropes with round strands (except those with three or four strands), parallel-lay closed wire ropes and rotation-resistant wire ropes with round strands or shaped strands, the length of lay of the fnished wire rope shall not exceed 7.25 × rope diameter (d). For single-layer wire ropes with shaped strands, e.g. triangular strand, the length of lay of the fnished wire rope shall not exceed 10 × wire rope diameter (d). For well-servicing strand, the length of lay of the fnished strand shall not exceed 10 × strand diameter (d).API Spec 9A pdf download.
