concrete for pipes shall have a mhdmum compressive

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Unformatted text preview: O 24 1774 180 234@6 1554 145i3 2040.00 2069.30 72 63 14.65&l.5 G= diameter R= inner diameter of the unstretched i“ = minimum rubber chord, hardness 40i5 IRHD stretching 15percent. of the unstretched rubber ring. wall thickness. d~,D,,,, L,,,and/, are nominal dimensions. Amendment No. 3 to IS 458:1988 Table 10B Spigot and %eket Dimensions for NP4 Unreinforced Pipes Made by Casting Process (Clause 5.3) All dimensimssin millimetres. t=ibl -1 1 ..----—-~ ---.“ -———- s -—. —.—- 1 I ---------- 300+4 13 322 ------ ---- 50 4s74=4 112+4 lo5&! 370.07 386.07 49 50 8.O&l.O 350+5 13 370 55 555+4 1IN 105+2 425.07 441.07 49 50 8.o&tl.o 400+5 13 417 60 615+4 i 12+4 105+2 4s0.07 4%.07 49 50 8.00+ 1.0 450i5 13 465 65 68&4 112+4 i05*2 536.07 552.07 49 50 8.00i1.O 500+5 13 513 70 735+4 112i4 105+2 590.07 606.07 49 50 8.00+1.0 600+5 13 609 75 850+4 112i4 105+2 700.07 716.07 49 50 8.00+1.0 7ooi7 18 706 85 980+5 141*5 132+3 808.00 830.00 61 65 11.00+1.2 800+7 18 803 95 1 IO(M5 141*5 13=3 924.00 946.00 61 65 11.00+1.2 9ooi7 18 901 100 1215*5 141*5 13M3 1036.00 1058.00 61 65 11.00+1.2 1 oooi7 18 998 115 1 330+5 141*5 132+3 1148.00 1170.00 61 65 11.00+1.2 I looi7 24 1097 125 1 520i6 155+6 145*3 1262.00 1291.30 72 63 14.65*1.5 1 200i7 24 1195 135 1 640+6 155*6 145+3 1372.48 1401.78 72 63 14.65*1.5 1 400+1o 24 1383 155 1 870+6 155*6 145*3 1590.91 I 620.21 72 63 14.65*1.5 1 600i10 24 1578 180 2 100+6 155+6 145+3 1814.91 1844.21 72 63 14.65+1.5 155*6 145+3 2040.00 2069.30 72 63 14.65+1.5 I 800i10 24 1774 205 2 340+6 G = diameter of the unstretched robber chord, hardness 40i5 IRHD stretching 15pereent. R = inner diameter T = minimum of the unstretched robber ring. wall thickness. d,, D~, ~~ and 1. are nominal dimensions. 6 I Amendment No. 3 to IS 458:1988 the (Amendment No. 2, Note 2 of Table 15 and Note 3 of Table 16) — Substhute following for the existing Note : 1 ‘Soft grademild steel wire may be used as rehsforcemerst m colkm of pipesof nominal internalsbsseterrrp to 250 mm only by increasing f the weight by a factor 140/84. Whereonly sofi grade mild steel wire is rssedfor makii collar cage&tbe weight of reirsforcemeotshall be total weight of col 6 and 7 multiplied by 140/84. This is allowed os a process requirement.’ (Amendment No. 2, Table 16, Note 1) — Insert the following at the end of Note 1: ‘The details of mild steel collars shall be as follows: NominalIntenraf Diameter of Pipe SreelCollar Dirnensiom ~ mm 2200 2400 2600 ‘ Caulking SpacGMin mm 22 22 22 , Min mm 6 6 6 Mim mm 250 250 250’ (Page 20, clause 6.3, second and third sentences) — Substitutefollowing the the for existing sentences: ‘Thecages shallonsist c ofspirals orcircular andstraights rings ofhard-drawn wireormildsteel rod. steel Reinforcement cages shall be placed symmetrically with respect to the thickness of the pipe wall.’ (Page 20, clause 6.4.l,first sentence) — Insert the following at the end of first sentence: ‘or 53 grade ordinary Portland cement.’ (Page 20, clause 7.1): a) Insert the following at the end of first sentence: ‘However, in case of pipes manufactured by casting process, the internal diameter, wall thickness, the...
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