Technical Data

Ductile Iron Push-on Joint Socket Fittings which conform to Product standards: BS-EN-545: 1995 / ISO-2531:1998 / IS-9523: 2000. We also supply D.I. Fittings which are suitable for both Mechanical Joint and Pushon Joint conforming to BSEN: 545/1995 and IS:9523/2000.

The mechanical properties of Fittings (representative of finished products) are tested for tensile strength (Min 420 Mpa), hardness (Max 230 BHN) and elongation (Min 5%) to verify mechanical properties.

All Ductile Iron fittings are tested at the following test pressure as specified in ISO : 2531 / BSEN: 545/1995 AND IS : 9523.


	For hydrostatic test, the fittings are kept under pressure for 10 seconds. They withstand the pressure test without showing any sign of leakage, sweating or other defect of any kind. The test is conducted before the application of surface coating.

Diameter mm	Works Test Pressure (kg/cm2)
80-300	25
350-600	16
700-1200	10
900-1200	10


	Dimensions of Push-on and Mechanical Joint Fittings

	External Diameter DE (mm)		Wall Thickness, DE (mm)
DN	Nominal	Tolerance	K12	Tolerance
80	98	+1/-2.7	7.0	-2.38
100	118	+1/-2.8	7.2	-2.40
125	144	+1/-2.8	7.5	-2.42
150	170	+1/-2.9	7.8	-2.45
200	222	+1/-3.0	8.4	-2.50
250	274	+1/-3.1	9.0	-2.55
300	326	+1/-3.3	9.6	-2.60
350	378	+1/-3.4	10.2	-2.65
400	429	+1/-3.5	10.8	-2.70
450	480	+1/-3.6	11.4	-2.75
500	532	+1/-3.8	12.0	-2.80
600	635	+1/-4.0	13.2	-2.90
700	738	+1/-4.3	14.4	-3.0
750	790	+1/-4.4	15.0	-3.05
800	842	+1/-4.5	15.6	-3.10
900	945	+1/-4.8	16.8	-3.20
1000	1048	+1/-5.0	18.0	-3.30
1100	1152	+1/-5.4	19.2	-3.4

It may appear that the test pressure for fittings are low compared to the allowable working pressures in pipes. But fittings with K12 thickness of ductile iron cannot burst at allowable working pressures of pipes.

Due to practical difficulties, fittings are not tested at the factory to very high pressures. BS : 8010 Section 2.1 British Standard Code of Practice for Pipeline Part 2 (Section 2.1 - Ductile Iron) Clause 13 says, “Practical considerations limit the works hydrostatic test pressure to values which may be lower than the site test pressure". The same comment is mentioned in IS : 9523/2000 also. The above pressures are sufficient to detect any casting flaw. After the pipeline is laid and fittings are in position and provided with proper anchorage, the entire pipeline can be pressure tested at a much higher pressure than the works test pressure.


	Dimensions of Flange Drilling for Flange Fittings-PN 10

All dimensions in millimeters
Nominal Dimensions Diameter								Holes		Bolt
										Size
										metric
DN	D	E	C	b	f	a	s	Nos.	Dia (d)
80	200	132	160	16	3	19	15	4	19	M16
100	220	156	180	16	3	19	15	8	19	M16
125	250	184	210	16	3	19	15	8	19	M16
150	285	211	240	16	3	19	15	8	23	M20
200	340	266	295	17	3	20	15	8	23	M20
250	395	319	350	19	3	22	16	12	23	M20
300	445	370	400	20.5	4	24.5	17.5	12	23	M20
350	505	429	460	20.5	4	24.5	19.5	16	23	M20
400	565	480	515	20.5	4	24.5	19.5	16	28	M24
450	615	530	565	21	4	24.5	20	20	28	M24
500	670	582	620	22.5	4	26.5	21	20	28	M24
600	780	682	725	25	5	30	24	20	31	M27
700	895	794	840	27.5	5	32.5	24	24	31	M27
750	960	857	900	29	5	34	24	24	31	M27
800	1015	901	950	30	5	35	24.5	24	34	M30
900	1115	1001	1050	32	5	37.5	26.5	28	34	M30
1000	1230	1112	1160	35	5	40	28	28	37	M33
1100	1340	1231	1270	38	5	43	30	28	37	M33


	Dimensions of Flange Drilling for Flange Fittings-PN 16

All dimensions in millimeters
N. Dia	Dim.							Holes		Bolt Size metric
DN	D	E	C	b	f	a	s	Nos.	Dia (d)	-
80	200	132	160	16	3	19	15	8	19	M16
100	220	156	180	16	3	19	15	8	19	M16
125	250	184	210	16	3	19	15	8	19	M16
150	285	211	240	16	3	19	15	8	23	M20
200	340	266	295	17	3	20	16	12	23	M20
250	400	319	355	19	3	22	17.5	12	28	M24
300	455	370	410	20.5	4	24.5	19.5	12	28	M24
350	520	429	470	22.5	4	26.5	21	12	28	M24
400	580	480	525	24	4	28	22.5	16	31	M27
450	640	548	585	26	4	30	24	16	31	M27
500	715	609	650	27.5	4	31.5	25	20	34	M30
600	840	720	770	31	5	36	27	20	37	M33
700	910	794	840	34.5	5	39.5	27.5	24	37	M33
750	970	857	900	36	5	41	28	24	37	M33
800	1025	901	950	38	5	43	30	24	40	M36
900	1125	1001	1050	41	5	46	32.5	28	40	M36
1000	1255	1112	1170	45	5	50	35	28	43	M39
1100	1355	1218	1270	48.5	5	53.5	37.5	32	43	M39


	Tolerance on Lenghts

Types of castings	Tolerance (mm)
Fittings for socketted joints	±20
Fittings for flanged joints	±10*


	The Permissible Deviations of the Lengths of Fittings

Types of fittings	Nominal diameter DN mm	Deviation in L and H mm
Flanged sockets/ Flanged spigots / collars, tapers	80-1000	±25
Tees		80-1000+50/-25
Bends 90 (1/4)	80-1000	±(15+0.03 DN)
Bends 45 (1/8)	80-1000	±(10+0.025 DN)
Bends 22 30’ and 11 15’	80-1000	±(10+0.02 DN)


	Tolerance on Thickness of Flange

Type of Flange	Tolerance
Integrally cast flanges	± (3+0.05b)
Welded and screwed on Flanges	± (2+0.05b)


	Push-on Joint Fittings - Allowable Ovality

Nominal Diameter DN	Allowable difference between Minor Axis and DEMin
mm	mm
80-300	1.0
350-600	1.75
700	2.0
750-800	2.4
900-1100	3.5


	Push-on Joint Fittings - Allowable Ovality

Nominal Diameter DN	Allowable ovality of Spigot of External diameters DE
mm	mm
80-150	5
200-350	10
400-450	20
600-800	30
900-1100	40


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