FIGURING THE WEIGHT OF A PIPE

Figuring the weight of a pipe and its contents is necessary when you are choosing the needed strength of a pipe hanger. There is a formula that you can use to accomplish this goal. Let’s say that you want to know how much a

Nominal pipe size (NPS), in IP	ASHRAE std. wt. size, mm	AWWA pipe size, mm	NFPA pipe size, mm	ASTM copper tube size, mm	Nominal pipe size DN, mm
Vs	—	_	—	в	6
3/ie	—	—	—	8	8
У4	8	—	—	10	10
%	10	—	—	12	12
y2	15	12.7 & 13	12	15	15
%	—		—	18	18
3/4	20	—	—	22	20
1	25	25	25 & 25.4	28	25
Г/4	32	—	33	35	32
1У2	40	45	38 & 38.1	42	40
2	50	50 & 50.8	51	54	50
2Уг	65	63 & 63.5	63.5 & 64	67	65
3	80	75	76 & 80	79	80
ЗУ2	—	—	89	—	90
4	100	100	102	105	100
4У2	—	114.3			115
5	—	—	127	130	125
6	150	150	152	156	150
8	200	200	203	206	200
10	250	250	—	257	250
12	300	300	305	308	300
14	—	350	—		350
18	—	400	—		400
18	—	—	—		450
20	—	500	—		500
24	—	600	—		600
28					700
30					750
32					800
36					900
40					1000
44					1100
48					1200
52					1300
56					1400
60					1500

FIGURE 11.2 ■ Equivalent metric (SI) pipe sizes. (Courtesy of McGraw-Hill)

piece of pipe weighs. You will need some information, which can be found in Figure 11.5. And, you will need the formula, which is as follows:

W = F X 10.68 X T X (O. D. — T)

You’re probably wondering what all the letters mean, and you should be. I’ll tell you. The letter W is the weight of the pipe in pounds per foot. A relative

Nominal rod diameter, in	Root area of thread, in2	Maximum safe load at rod temperature of 650°F, lb
Vi	0.027	240
s/ie	0.046	410
%	0.068	610
Vi	0.126	1,130
%	0.202	1,810
3/4	0.302	2,710
%	0.419	3,770
1	0.552	4,960
lVs	0.693	6,230
lVi	0.889	8,000
1%	1.053	9,470
IVi	1.293	11,630
1%	1.515	13,630
13A	1.744	15,690
1%	2.048	18,430
2	2.292	20,690
2У«	3.021	27,200
2 Vi	3.716	33,500
2%	4.619	41,600
3	5.621	50,600
3Vi	6.720	60,500
ЗУ2	7.918	71,260

FIGURE 11.3 ■ Load ratings of threaded rods. (Courtesy of McGraw-Hill)

Pipe size, in	Rod size, in
2 and smaller	3/8
2Vi to 3Vi	Vi
4 and 5	5/«
6	3/4
8 to 12	%
14 and 16	1
18	lVfe
20	Г/4
24	IVi

FIGURE 11.4 ■ Recommended rod sizes for individual pipes. (Courtesy of McGraw-Hill)

weight factor, which can be found in Figure 11.5, is represented by the letter F. Wall thickness of a pipe is known as the letter T. You have probably guessed that O. D. represents the outside diameter of the pipe, in inches. I said that you could figure out the weight of pipe and its contents. To determine the weight of water in pipe, refer to Figure 11.6.

Подпись: been there done that As a young plumber, I guessed at a lot of math re-quirements. This was not always smart. Don’t gamble when it comes to pipe support. Refer to the tables here to make sure that your choice of hangers is safe and secure.

FIGURE 11.5 ■ Relative weight factors for metal pipe. (Courtesy of McGraw-Hill)

IPS, in	Weight per foot, lb	Length in feet containing 1 ft3 of water	Gallons in 1 linear ft
‘/4	0.42		0.005
%	0.57	754	0.0099
l/2	0.85	473	0.016
%	1.13	270	0.027
1	1.67	166	0.05
ІУ4	2.27	96	0.07
P/2	2.71	70	0.1
2	3.65	42	0.17
2У2	5.8	30	0.24
3	7.5	20	0.38
4	10.8	11	0.66
5	14.6	7	1.03
6	19.0	5	1.5
8	25.5	3	2.6
10	40.5	1.8	4.1
12	53.5	1.2	5.9

FIGURE 11.6 ■ Weight of steel pipe and contained water. (Courtesy of McGraw-Hill)

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FIGURING THE WEIGHT OF A PIPE

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