Machine Drawing

136 Machine Drawing

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d:\N-Design\Des8-1.pm5 Seventh Print

8.5.2 CI Pipe Fittings

For small size cast iron and steel pipes upto 2.5 inches size and less, the fittings are threaded.

Cast iron pipe fittings of greater diameter are provided with flanges (Fig. 8.13).

(a) (b) (c) (d) (e)

45°

(f) (g) (h) (i) (j)

(a) 90° Elbow (b) 90° long radius elbow (c) 45° Elbow (d) Side outlet 90° Elbow

(e) Tee (f) Cross (g) Side outlet tee (h) 45° Lateral (i) Reducer (j) Tee reducer

Fig. 8.13 CI pipe fittings

8.5.3 PVC Pipes and Fittings

Plastic pipes and pipe fittings made of polyvinyle chloride (PVC) are extensively used for

agricultural, industrial and domestic use. These pipes are made in sizes varying from 20 mm

to 315 mm diameter as per IS 4985:81.

f

32

f

25

f

25

18 18

40

a-Coupling 25 × 25

f

25

f

20

f

32

18 15

40

4

b-Reducer 25 × 20

6

f

25

f

20

f

32

25

40

c-Female thread

adapter 25 × 20

Fig. 8.14 PVC pipe fittings (contd.)