Click here to make tpub.com your Home Page

Page Title: Valves cont'd
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 



DOE-HDBK-1132-99
Consideration should also be given to provide future expansion of the system
without major system outages.
Particular attention to valve installation and positioning is recommended
to avoid head and knee injuries, eye injuries (due to the presence of valve
stems in the horizontal plane at eye level), and dripping hazards.
Valve access is best accomplished in the natural routing of pipe from
point to point, avoiding the use of vertical loops and pockets. Control
valves should be located adjacent to walkways wherever possible.
(Access platforms should be provided where valves are otherwise
inaccessible.)
Only infrequently operated valves should be located so that the bottom of
the handwheel is more than 6 feet, 6 inches above a floor or platform.
A minimum of 4 inches of knuckle clearance is recommended around
handwheels.
Chain-wheel operators can be used as long as they do not present a
hazard to operating personnel.
Control valves should be located near the operating equipment to be
observed while on local manual control.
Control valve manifolds should have a minimum of at least three
diameters of straight pipe both upstream and downstream of the control
valve.
Concentric reducers are recommended to make size reductions at the
control valve.
II-17


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business