ISO 1704:2022 pdf download.Ships and marine technology — Stud- link anchor chains
This document specifies the shape, proportions, dimensions and tolerances of the component parts of stud-link anchor chains.
NOTE Statutory requirements, rules and regulations can be applicable to the individual ships concerned.
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 2093:1986, Electroplated coatings of tin — Specification and test methods
ISO 2339, Taper pins, unhardened
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 chain-shots
component of an anchor chain consisting of common links (3.2) and joining shackles (3.5) with a given nominal length (e.g. 27,5 m or 25 m)
3.2 common link
basic link of which a chain-shot (3.1) consists
3.3 enlarged link
strengthened link connecting a common link (3.2) and an end link (3.4) in case of connecting chain-shots with a D type joining shackle (3.5), or connecting a common link and a swivel
3.4 end link
strengthened link attached to the ends of two chain-shots (3.1) in case of connecting chain-shots with a D type joining shackle (3.5), or connecting an outboard chain-shot with an end shackle
3.5 joining shackle
shackle used for connecting chain-shots (3.1)
Note 1 to entry: Joining shackles can be of D-type or Kenter type.
3.6 end shackle
enlarged shackle used for connecting the outboard chain-shot to the anchor
3.7 swivel
movable component of the outboard chain-shot that prevents excessive twisting of the chain cable
3.8 swivel shackle
shackle fastened to the anchor shackle or anchor shank with the same function as a swivel
3.9 outboard chain-shot
additional short chain-shot fastened to the anchor shackle or anchor, including common link (3.2) enlarged link (3.3), end shackle (3.6) or swivel shackle (3.8)
3.10 chain end shot
chain-shot fastened to the cable clench, including end link (3.4), enlarged link (3.3) and common link (3.2)
3.11 nominal size
nominal diameter of the common link (3.2)
4 Shape and dimensions
4.1 Shape
The links, shackles and component parts should be of the shapes and proportions shown in Figures 2 to 9 referred to as the standard model.
4.2 Dimensions
4.2.1 General
4.2.1.1 The dimensions of links, shackles and component parts should be in accordance with the values given in Tables 1 to 9, referred to as the standard model.
4.2.1.2 The nominal diameter d is a design diameter measured at the crown of a common link as an average value out of two measurements perpendicular to each other. See Figure 2 and Table 1.
4.2.1.3 All dimensions, based on the nominal diameters d of the common links, shall be measured after the chain and shackles have been subjected to the statutory proof loads in 10.3.
4.2.2 Enlarged links
The proportions of the enlarged links are the same as those of the common links. The nominal diameter of the enlarged link is 10 % larger than the nominal diameter of the common link, d 1 = 1,1d, the calculated values shall be rounded to the nearest nominal diameter of the common link.
4.2.3 Common stud links and enlarged links
The inside diameter of common links and enlarged links should be sufficient to allow each link to bed properly and work freely. See Figures 2 and 3.
4.2.4 End links
The inside diameter of the end links should be sufficient to allow the shackle link to bed properly and work freely. See Figure 4. The nominal diameter of the end link is 20 % larger than the nominal diameter of the common link, d 2 = 1,2d.
4.2.5 Shackle retaining pin
4.2.5.1 The retaining pin used in D type joining shackles and end shackles shall be a taper pin having a taper of not less than 1∶50 and not more than 1∶16 on the diameter.
4.2.5.2 The retaining pin used in Kenter type shackles shall be a taper pin having a taper of not less than 1∶50 and not more than 1∶32 on the diameter. The nominal diameter of the taper pin shall be 0,37 × d, the calculated values shall be rounded to the nearest standardised nominal diameter in accordance with ISO 2339. The nominal length of the taper pin shall be (w 4 -2h 1 ) nominal diameter to taper pin (see Figure 5), the calculated values shall be rounded to the nearest standardised nominal length in accordance with ISO 2339.
4.2.5.3 The nominal sizes and lengths required are given in Tables 4, 5 and 6. Other details of the taper pins, e.g. end-radius, cone tolerance and surface finish, shall be in accordance with ISO 2339.
4.2.5.4 Taper pins shall be either of stainless steel or tin-coated carbon steel. If tin-coated, this shall be either by a hot-dip process or electroplating in accordance with ISO 2093∶1986, 7.1, service condition 4.ISO 1704 pdf download.ISO 1704 pdf download
