Fire pump suction

[adson]

NFPA 20 indicates that; (2003 ed. ) ,



5.14.6.3 Elbows and Tees.

5.14.6.3.1 Unless the requirements of 5.14.6.3.2 are met, elbows and tees with a centerline plane parallel to a horizontal split-case pump shaft shall not be permitted. (See Figure A.5.14.6.)

5.14.6.3.2 The requirements of 5.14.6.3.1 shall not apply to elbows and tees with a centerline plane parallel to a horizontal split-case pump shaft where the distance between the flanges of the pump suction intake and the elbow and tee is greater than 10 times the suction pipe diameter.

5.14.6.3.3 Elbows with a centerline plane perpendicular to the horizontal split-case pump shaft shall be permitted at any location in the pump suction intake.





Does it only apply to Horizontal split case pump as mentioned ?

I mean if i use an end-suction or inline pump, i do not have to obey this rule, right...?

 

[firepe]

That is correct. This section of NFPA 20 only applies to horizontal split case pumps, not vertical inline pumps.