Water, Gas and Air Pipelines

We design and supply superior quality steel pipes for various water, air and gas transport applications. Made of high quality material, these are high in performance and have found various uses in different industrial applications. These pipelines are meant for the movement of water, oil & natural gas at a very high pressure. Buried high pressure oil and gas pipelines are tested for strength by pressurizing them to at least 125% of their maximum operating pressure (MAOP).

Since many long distance transmission pipelines are designed to have a steel hoop stress of 80% of specified minimum yield (SMYS) at MAOP, this means that the steel is stressed to SMYS and above during the testing. Leak testing is performed by balancing changes in the measured pressure in the test section against the theoretical pressure changes calculated from changes in the measured temperature of the test section.

For Water, Gas and Air Pipeline conforming to IS: 1239

N.B. &Series		Outside Diameter		Wall thickness		Nominal Mass of Galvanized Steel Tubes					Socket
						Plain end		Screwed & Socketed
mm	inch	Min. mm	Max. mm	mm	SWG	Kg /mtrs.	mtrs /tonne	Kg/ Mtrs	Mtrs /tonne	No.of Pipes per bundle	Min. Outer dia. mm	Min. Length mm
15 L M H	1/2 1/2 1/2	21.0 21.0 21.0	21.4 21.8 21.8	2.00 2.60 3.20	14 12 10	0.947 1.210 1.440	1056 826 694	0.956 1.220 1.450	1046 820 690	165 132 110	27.0	37.0
20 L M H	3/4 3/4 3 / 4	26.4 26.5 26.5	26.9 27.3 27.3	2.30 2.60 3.20	13 12 10	1.380 1.560 1.870	725 641 535	1.390 1.570 1.880	719 637 532	112 98 84	32.5	39.0
25 L M H	1 1 1	33.2 33.3 33.3	33.8 34.2 34.2	2.60 3.20 4.00	12 10 8	1.980 2.410 2.930	505 415 341	2.000 2.430 2.950	500 412 339	80 65 55	39.5	46.0
32 L M H	1 ¼ 1 ¼ 1 ¼	41.9 42.0 42.0	42.5 42.9 42.9	2.60 3.20 4.00	12 10 8	2.540 3.100 3.790	394 323 264	2.570 3.130 3.820	389 319 262	60 51 42	49.0	51.0
40 L M H	1 ½ 1 ½ 1 ½	47.8 47.9 47.9	48.4 48.8 48.8	2.90 3.20 4.00	11 10 8	3.230 3.560 4.370	310 281 229	3.270 3.600 4.410	306 278 227	48 45 36	56.0	51.0
50 L M H	2 2 2	59.6 39.7 59.7	60.2 60.8 60.8	2.90 3.60 4.50	11 9 7	4.080 5.030 6.190	245 199 162	4.150 5.100 6.260	241 196 160	39 30 27	68.0	60.0
65L M H	2 ½ 2 ½ 2 1/2	75.2 75.3 75.3	76.0 76.6 76.6	3.20 3.60 4.50	10 9 7	5.710 6.410 7.930	175 156 126	5.830 6.540 8.050	172 153 124	27 24 20	84.0	69.0
80 L M H	3 3 3	87.9 88.0 88.0	88.7 89.5 89.5	3.20 4.00 4.80	10 8 6	6.720 8.360 9.900	149 120 101	6.890 8.530 10.400	145 117 96	23 19 16	98.0	75.0
100 L M H	4 4 4	113.0 113.1 113.0	113.9 115.0 115.0	3.60 4.50 5.40	9 7 5	9.750 12.200 14.500	103 82 69	10.000 12.500 14.800	100 80 68	16 13 11	124.0	87.0
125 M H	5 5	138.5 138.5	140.8 140.8	4.80 5.40	6 5	15.900 17.900	63 56	16.400 18.400	61 54	10 9	151.0	96.0
150M H	6 6	163.9 163.9	166.5 166.5	4.80 5.40	6 5	18.900 21.300	53 47	19,500 21,900	51 46	8 7	178.0	96.0
L=Light, M = Medium, H= Heavy

Tolerances
a) Outside Diameter Maximum Deviation Upto & including 21.3mm #9; Above 21.3mm	Light Tubes+ Not limited -8%
	Medium and+ Not limited Heavy Tubes -10%
Weight	Single tube +10% (Light series)
	Single tube (Medium& Heavy series) ± 10%
	For Quality per Load of 10 tonnes minimum (Light series) ± 5%
	For Quantity per Load of 10 tonnes minimum (Medium & heavy series) ± 7.5%
Length	4 to 7 meters unless otherwise specified

For water steel pipes and sewage conforming to IS: 3589/2001

Outside Diameter OD	Nominal Bore	Wall Thickness	Calculated Weight (Plain end)
mm	mm	mm	Kg./ mtr.	Mtrs./tonne approx.
168.3	150	2.6	10.6	94
		3.2	12.0	83
		4.0	16.2	62
		4.5	18.2	55
219.1	200	2.6	13.9	72
		3.6	19.1	52
		4.5	23.8	42
		6.3	33.1	30
273.0	250	3.6	23.9	42
		4.0	26.5	38
		5.0	33.0	30
		6.3	41.1	24
323.9	300	4.0	31.8	31
		4.5	35.4	28
		5.6	44.0	23
		7.1	55.5	18
355.6	350	4.0	34.7	29
		5.0	43.2	23
		5.6	48.3	21
		8.0	68.6	15

Tolerances
Outer Dia	± 0.75%
Thickness	± 10%
Length	4 to 7 meter
Notes Thickness as stated above are commonly used. However, pipes of other thickness can also be manufactured and supplied to meet customers' requirement. Pipes can be supplied in grades FE-330, FE-410 and FE-450.