Page 100 - SMM2 eBOOK

Q.8 Pipes and fittings (cont'd)

5. Flow and return header pipe (except those forming an integral part of plant or equipment)
shall be enumerated stating the length, type and nominal size of the main pipe, the
number, length, type and nominal size of each branch pipe, the method of construction
and the method of jointing the ends.

6. Pipe fittings and purpose-made pipe fittings shail each be so described and enumerated
as extra over the pipe in which they occur. Cutting and jointing the pipes to fittings shail be
deemed to be included. The following details shall be given:

a. For reducing fittings, the nominal size of each end shall be stated.
b. For branch fittings stating whether square, angled or sweep.
c. For inspection doors, the method of sealing the door. Where such doors occur in
pipe fittings they shall be given in the description of the fitting.

7. Expansion loops shall be described and enumerated stating the limiting dimensions and
the amount of expansion to be accommodated.

8. Expansion compensators shall be described and enumerated stating the type of joint and
the amount of expansion to be accommodated.

9. Providing all flanges and unions necessary solely for erection purposes shall be deemed
to be included in the items.

10. Providing everything necessary for jointing shall be deemed to be included with the items
of pipework.

11. Screwed sockets, tappings, bosses and welding-necks welded to pipes or flanges shall
each be enumerated separately stating the size and kind of pipe or flange concerned.
Perforating the pipe or flange shall be deemed to be included with the items.

Q.9 Special connections, etc.

1. Special connections and special joints in pipes shall each be enumerated separately
(except where given in the description of another enumerated item) stating the nominal
size and kind of pipe concerned and the method of jointing. Classification shall be as
follows:

a. Connections between pipes of differing materials and differing grades of the same
material.
b. Connections between pipes and appliances or equipment.
c. Connections to existing pipes

2. Isolated joints which differ from that included in the description of the pipe shall be given
as extra over the pipe in which they occur stating the type of jointing.

3 Connecting ends of flue pipes to boilers, chimneys and the like shall each be enumerated
separately stating the nominal size and kind of pipe concerned, the method of jointing and
the type of packing required.

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