BS ISO 19427:2019 pdf download – Steel wire ropes — Pre-fabricated parallel wire strands for suspension bridge main cable — Specifications
This document specifies the production methods, specifications, requirements, test methods, inspection rules, marks, packing, transportation and storage for pre-fabricated parallel wire strand (PPWS), which are made of hot-dip galvanized or zinc-aluminium coated high tensile steel wires described in ISO 19203.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 4986, Steel casting — Magnetic particle inspection
ISO 4992-2, Steel castings — Ultrasonic examination — Part 2: Steel castings for highly stressed components
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 10474:2013, Steel and steel products — Inspection documents
ISO 17558:2006, Steel wire ropes — Socketing procedures — Molten metal and resin socketing
ISO 19203, Steel wire rod and wire products — Hot-dip galvanized and zinc-aluminium coated steel wires for bridge cables — Specifications
EN 1774, Zinc and zinc alloys — Alloys for foundry purposes — Ingot and liquid
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
pre-fabricated parallel wire strand
strand factory pre-fabricated by assembling a group of wires laid parallel in a hexagonal (regular or irregular) shape, bound together at intervals by binding tape, and fitted with sockets (3.3) at each end
Note 1 to entry: The section and the structure of PPWS is shown in Figure 1.
binding tape
plastic tape reinforced by plastic fibres
Note 1 to entry: The tapes are bound at intervals to keep the shape of strand tight and can permit the wires to open or spread sufficiently to adjust the stresses in the strand during reeling and unreeling.
PPWS (3.1) termination incorporating a socket basket (3.5), see Figure 2
Note 1 to entry: Length adjusting system shall be provided at connection between PPWS socket and anchorage structure.
socketing medium
molten metal alloy or resin
socket basket
tapered portion of a socket (3.3) within which the evenly splayed out wires are secured
PPWS grade
R m
level of requirement of nominal tensile strength grade which is designated by a number EXAMPLE 1 770, 1 960.
Note 1 to entry: PPWS (3.1) strength grade correspond to the strength grades of the wires in the PPWS. It is expressed in MPa.
nominal wire diameter
d nominal diameter of the perpendicular cross-section of the steel wire after coating
Note 1 to entry: It is expressed in millimetres.
4 Designation of product
The PPWS shall be ordered in accordance with this document and be designated as follows:
a) ISO 19427;
b) PPWS;
c) nominal diameter of steel wire, in millimetres;
d) number of steel wires composing PPWS;
e) PPWS grade;
f) coating type:
EXAMPLE 1 A PPWS made up of 91 pieces of zinc coated steel wires with diameter of 5 mm and grade of 1770,is designated:
ISO 19427-PPWS-5,00-91-1770-Zn
where Zn is hot-dip zinc coated.
EXAMPLE 2 A PPWS made up of 127 pieces of zinc-aluminium alloy coated steel wires with diameter of 7 mm and grade of 1860, is designated:
ISO 19427-PPWS-7,00-127-1860-ZnAl
where ZnAl is zinc-aluminium alloy coated.
5 Requirements
5.1 Traceability
The traceability shall be done from the beginning to the end of manufacturing. The manufacturer shall use suitable means to ensure the conformity of products and identify the status of products with respect to monitoring and measurement requirements throughout production and delivery.
The manufacturer shall control the unique identification of the products, and shall retain the documented information necessary to enable traceability.