BOILERMAN: Regulation 67. Pipes and pipe fittings for steam or feed water.

P.U.(A) 5/70

FACTORIES AND MACHINERY (STEAM BOILER AND

UNFIRED PRESSURE VESSEL)

REGULATIONS, 1970

PART IV - MISCELLANEOUS PROVISIONS

Regulation 67. Pipes and pipe fittings for steam or feed water.

(1) Every ferrous and non-ferrous pipe, bend, elbow, tee and special for use under steam or feed

water pressure shall comply in respect of material, mode of manufacture, dimensions, hydrostatic

and other tests, method of securing and type of flange and maximum safe working pressure with

the appropriate provisions of British Standard Specification No. 806-Ferrous pipes and piping

installations-or No. 1306- Non-ferrous pipes and piping installations.

(2) The limits within which any such pipe, bend, elbow, tee and special are to be used shall be in

accordance with the table following:

TABLE

MAXIMUM DESIGN PRESSURES AND

TEMPERATURES

Material and form	Method of manufacture	Maximum design pressure in pounds per square inch	Maximum design temperature in degrees Fahrenheit	Remarks
Carbon Steel	Cold drawn seamless Hot finished seamless Hydraulic lapwelded	No restriction ………….. …………..	900 900 900	Class A Class B Class C
Carbon Steel	Hot finished seamless Roll lapwelded Buttwelded	300 .. .. .. 300 .. .. .. 300 .. .. ..	500 500 500	Class D Class E Class F
Carbon Steel	.. Cast	.. No restriction	.... 900
Cast iron	.. .. Cast ..	.. Blow down 150 Steam 150 Feed 200 ..	400 400 400	elbow, tee or special only
Bronze or gunmetal	Cast .. ..	Steam 250 Feed 350 ..	405 300	elbow, tee or special only
Copper	Solid drawn	Up to and including 5 inches diameter for steam 250 Above 5 inches up to and including 8 inches diameter for steam 175 Up to and including 8 inches diameter for feed 300	405 405 300	Straights and bends

NOTE-Class of manufacture A to F means class of manufacture as set out tin British Standard

specification No. 806-Ferrous pipes and piping installations.

(3) A screwed and socketed joint may be used for any steam pipe, bend or fitting if such pipe,

bend or fitting is made of steel or wrought iron for service at a temperature not greater than five

hundred degrees Fahrenheit and at a pressure within the following limits:

Nominal bore in inches	Maximum design pressure in pounds per square inch
1" diameter and under ...	175
1 1/2" ,,	150
3" ,,	125
4" ,,	100

(4) Every copper pipe and bend for steam or feed water service shall be carefully annealed

before fitting and thereafter at intervals of not more than four years of working life.

(5) Piping for service with an unfired pressure vessel not under steam pressure shall comply

generally with the provisions of this regulation in respect of piping under steam pressure:

Provided that an Inspector may, in his discretion, and in consideration of the service conditions,

allow the limits of pressure, temperature, type of joint and size prescribed in this regulation to be

exceeded by an amount not greater than fifty per centum thereof.

BOILERMAN