International Standard @ 7931 0 * 4 44gjb INTERNATlONAL ORGANlZATlON FOR STANOARDIZATION~MEKlYHAPOJlHAR OPTAHH3AUHR n0 CTAHllAPTH3ALlHH~RGANlSATlON INTEANATIONALE DE NORMALISATION Insulation caps and[.]
I n ternati onal INTERNATlONAL ORGANlZATlON I n su l ati on Standard FOR STANOARDIZATION~MEKlYHAPOJlHAR caps an d bu sh es OPTAHH3AUHR for n0 @ 7931 *44gj 4b CTAHllAPTH3ALlHH~RGANlSATlON resi stan ce INTEANATIONALE DE NORMALISATION wel d i n g eq u i pm en t Capuchons et bagues isolantes pour les matkriels pour soudage par rtkistance Fi rst U DC edi ti on - 965-06-01 Ref 621 791 76 039 Descri ptors : wel d i n g , resi stan ce wel d i n g , wel d i n g eq u i pm en t, wel d i n g accessories, d i m en si on s, d esi g n ati on , No IS0 7931 -1 965 (E) m arki n g Pri ce based on pages Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies) The work of preparing International Standards is normally carried out through IS0 technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting International Standard IS0 7931 was prepared by Technical Committee ISO/TC 44, Welding and allied processes @ International Organization for Standardization, Printed in Switzerland 1999 I NTERNATI ONAL STANDARD I n su l ati on caps IS0 an d bu sh es for resi stan ce 7931 -1 985 (E) wel d i n g eq u i pm en t Scope Th i s an d fi el d I n tern ati onal qu i rem ents for of appl i cati on Stan d ard i n su l ated speci fies caps and ci rcu i t for resi stan ce wel di ng back-ups accordi ng to IS0 3.1 di m ensi on s bushes i n th e eq u i pmen t, and re- secon d ary Marki n g In su l ati on caps to th i s In tern ati on al Stan d ard shal l be marked wi th th e l etter C especi al l y for use i n 5827 3.1 Desi gn ati on Th e d esi gn ati on for an i n su l ati on cap C wh ich conform s to th i s Referen ces IS0 667, General Plain In tern ati on al washers for metric bolts, screws cap screws and nuts In su l ati on - 4762, grade cap sh al l be as fol l ows : I S0 7931 - C plan 3.2 IS0 Stan d ard Hexagon socket head - In su l ati on bu sh es B Product A In su l ati on bush es B sh all h ave th e di m en si on s g i ven i n fi g u re an d th e tabl e IS0 6627, Spot welding - Electrode back-ups and clamps Di m en si on i n m i l l i m etres Di mensions 3.1 In su l ati on caps C In sul ati on caps C shal l h ave th e d i mensi ons sh own i n fi g u re Di m en si on s surface i n m i l l i m etres, rou g h n ess val u e i n m i crom etres I_ d 20 Fi g u re - I nsu l ati on Fi g u re - i n sul ati on bu sh cap Tabl e - Dim ensionsl ) Di m en si on s 3.1 i n m i l l i m etres Materi al Si ze d , *) d2 d3 d4 d5 I, I, Th e materi al from wh ich th e i n sul ati on caps are m anu factu red shal l be h i g h -stren g th i n sul ati ng m ateri al , e.g gl ass fi bre re- i n forced pol yam i de 3.1 13 0.5 6,4 9.5 16 20 17 3,5 8.4 1 ,5 20 22 10 19 6,5 0.5 14 24 11 24 12 21 9,5 13 16 27 13 26 Fi ni sh 1) Th e fi n i sh shal l en sure th at th e edg es are ch amfered g rooves rou n d ed and th e Wh ere d4 or sl otted 2) For the h ol e d i am eter hol es are i n form ati on used, i s si d erabl y a washer l arg er i s necessary th an th e to su pport d i am eter th e bu sh on l y IS0 7931 -1 995 3.2.1 Materi al (El Th e m ateri al from which th e i n su l ati on bushes and wash ers are m anu factu red c) th e l etter B; d) th e si ze shal l be as fol lows : Exampl e of th e desi g n ati on for an i n sul ati on bush B of si ze : - bu sh : h i g h -stren g th i n su l ati n g m ateri al , e.g gl ass fi bre In su l ati on bush IS0 7931 - B 10 rei n forced pol yam i d e; - 3.2.2 wash er: steel , e.g Fe 51 Fi ni sh Th e fi n i sh shal l en sure th at th e edg es are ch amfered and th e Appl i cati on In su l ati on bushes form i n g sh all on l y be l oad ed wi th the to th i s torq u e In ternati on al m omen t of Stan d ard th e fi xi ng screws g rooves rou n d ed Ad di ti on al forces sh al l be taken u p by oth er measures (e.g 3.2.3 vi si on of sh ou l d ers or si m i l ar means of su pport) Marki n g In sul ati on bush es to thi s I n tern ati on al Stan d ard sh all be marked wi th th e l etter B and th e si ze, e.g 3.2.4 B Desi g nati on Th e desi g n ati on for an i n sul ati on bush B whi ch form s to th i s I n tern ati onal Stan d ard sh all compri se the fol l owi n g i tems i n the ord er g i ven : a) th e n am e; b) th e referen ce to th i s In tern ati on al Stan d ard ; Fi g u re - Typi cal exampl e of appl i cati on pro-