BS ISO 1704-2022 pdf free 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 Dtype 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.
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.
5 Tolerances
5.1 Common stud links
5.1.1 The allowable manufacturing tolerances on the nominal diameter d of the common links,measured at the crown, should be:
5.1.2 The cross-sectional area at the crown of the link shall be not less than the area of a circle of the nominal diameter.
5.1.3 The allowable manufacturing tolerances on the nominal diameter measured elsewhere on the link shall be 0 5 + % .
5.1.4 The tolerance of the diameter on the flush-butt welded parts shall be 0~+15 %.
5.1.5 The allowable manufacturing tolerance of the link except for the requirements specified above shall be ±2,5 %, taking into account the fact that all components of the anchor chain shall fit in with each other.
5.2 Length of five links
5.2.1 The length of five links is defined as
5 2 22 × + = pdd
The measurement shall be taken from
the outside.
5.2.2 The allowable manufacturing tolerances on a length of five links shall be 02 5 + ,% .
5.3 All other dimensions
5.3.1 The tolerances on diameters shall be 05 + % .
5.3.2 The tolerances on other than diameters shall be ±2,5 %.
6 Grade of the anchor chain
The grade of the anchor chain shall be shown in Table 1.
7 Connections
7.1 General
7.1.1 Examples in the use of connecting chain-shots with a joining shackle are shown in Figure 10.
7.1.2 Examples in the use of connecting an outboard chain-shot to an anchor are shown in Figure 11 and to a chain end shot are shown in Figure 12.
7.2 Nominal dimensions and shape of common links
The nominal dimensions and the shape of common links shall be as shown in Figure 1 and Table 2.BS ISO 1704 pdf download.