N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-9.31

Current through Register Vol. 46, No. 45, November 2, 2024

Section 14-9.31 - Feed piping

(a) The feedwater shall be introduced into a boiler in such a manner that the water will not be discharged directly against surfaces exposed to gases of high temperature or to direct radiation from the fire, or close to any riveted joints of the furnace sheets or of the shell. For pressures of 400 pounds or over, the feedwater inlet through the drum shall be fitted with shields, sleeves, or other suitable means to reduce the effects of temperature differentials in the shell or head. If necessary, the discharge end of a feed pipe shall be fitted with a baffle to divert the flow from the riveted joint. Feedwater, other than condensate returned as provided for in section 14-9.27(b) of this Subpart, shall not be introduced through the blowoff.

(b) When a horizontal-return tubular boiler exceeds 40 inches in diameter, the feedwater shall discharge at about three fifths the length from that end of the boiler which is subjected to the hottest gases of the furnace (except a horizontal-return tubular boiler equipped with an auxiliary feedwater heating and circulating device), above the central rows of tubes. The feed pipe shall be carried through the head or shell farthest from the point of discharge of the feedwater in the manner specified for a surface blowoff in section 14- 9.27(a) of this Subpart, and be securely fastened inside the shell above the tubes.

(c) In vertical tubular boilers having tubes four feet or less in length, the feedwater shall be introduced at a point not less than one fourth the length of the tube above the lower tube sheet or crown sheet. For tubes more than four feet in length, the feedwater shall be introduced at a point not less than 12 inches above the crown sheet. When the boiler is under pressure feedwater shall not be introduced through the openings or connections used for the water column, the water gage glass, or the gage cocks. In closed systems the water may be introduced through any opening when the boiler is not under pressure.

N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 14-9.31