Pipe Joints 141
dharm
d:\N-Design\Des8-1.pm5 Seventh Print
THEORY QUESTIONS
8.1 What is the criteria for selecting the pipe material?
8.2 How are pipe joints classified?
8.3 What are the methods of strengthening a cast iron steam pipe joint so as to withstand higher
pressures?
8.4 Differentiate between the joints for CI pipes and joints for copper pipes.
8.5 What is the purpose of providing a packing of compressible material, between the flanges in a
flanged pipe joint?
8.6 Explain how the flanges are provided at the ends of the steam pipes, used for joining wrought
iron and steel pipes.
8.7 Name the different types of joints used for hydraulic pipes.
8.8 Where and why a socket and spigot pipe joint is used?
8.9 What is the special feature of a union joint?
8.10 What is the purpose of providing an expansion joint in the pipe line, carrying hot fluids?
8.11 Explain the working of an expansion joint.
8.12 Describe any three types of pipe fitting, used in the pipe layout, made of (a) Gl, (b) CI and (c) PVC
pipes.DRAWING EXERCISES
8.1 Sketch the conventional representation of pipe threads.
8.2 Draw (a) sectional view from the front and (b) view from the side of different forms of flanged
joints used for cast iron steam pipes of diameter 100 mm.
8.3 Sketch any one method of strengthening cast iron steam pipe joints so that it will withstand
higher pressures.
8.4 Indicating proportions, sketch any one method of joining (a) copper steam pipes and (b) wrought
iron or steel pipes of diameter 100 mm.
8.5 Sketch a suitable pipe joint to connect two pipes, each of diameter 250 mm. The pipes are to be
laid underground. Indicate proportionate dimensions of various parts of the joint.
8.6 Draw (a) sectional view from the front and (b) view from the side of a hydraulic pipe joint of
flanged type, to connect two pipes, each of diameter 50 mm.
8.7 Sketch a union joint and mark the proportions on it, by choosing suitable value for the pipe size.
8.8 Draw (a) sectional view from the front and (b) view from the side of a gland and stuffing box type
of expansion joint, to connect two pipes, each of diameter 100 mm.
8.9 Sketch any three types of (a) GI, (b) CI and (c) PVC pipe fittings, indicating proportions.
8.10 Sketch (a) CI and (b) GI pipe layouts, incorporating most of the fittings.