Flowserve F519 Flanged ANSI - Manual (Page 3)

3 HEALTH AND SAFETY
When installing or maintaining valves:
a) Conduct a risk assessment and eliminate or reduce hazards to an acceptable level.
b) Work in accordance with Safe Systems of Work.
c) Observe all site Health and Safety Rules in particular Permit to Work and Hot Work procedures.
d) Wear all necessary Personal Protective Equipment.
e) Never remove or maintain a valve or joint unless the line has been fully de-pressurised, drained and
where necessary, purged of toxic / explosive / flammable media. Always operate the valve to the open
position to ensure that no trapped pressure exists within the cavity.
f) Never handle valves that have been used on harmful substances unless they have been completely
decontaminated and certified safe to handle.
g) Never use a valve on a duty which exceeds its prescribed operating parameters. Refer to Flowserve
Flow Control (UK) Ltd Technical Sales for performance curves or further information.
h) Never modify or alter valves unless the manufacturer has been consulted or recommends such
changes.
i) The valves wrenches are only designed for use in operating the valves and must not be used to carry
them by. Failure to observe this warning may result in operator injury.
j) Due to the large physical size and weight of some sizes of this product, always use correct lifting
methods and equipment when installing, removing and maintaining the product, and that it is correctly
supported in its final operating location.
k) Due to the variety of duties on which this product can be employed, it is the end users responsibility to
ensure the compatibility of the media with the materials of construction of the product for each specific
application (i.e.corrosion and erosion which may affect the integrity of the pressure-containing
envelope).
l) Before equipment is installed in areas which may be subject to seismic activity or extreme climatic
conditions consult Flowserve Flow Control (UK) Ltd. Technical Sales.
m) End Flanges: The end flange design of this product has been verified by either 2001(2003 addenda)
ASME Boiler and Pressure Vessel Code Section VIII Division 1 calculation method, by Finite Element
Analysis in accordance 2001(2003 addenda) ASME Boiler and Pressure Vessel Code Section VIII
Division 2 - Alternative Rules, or by experimental testing as defined in BS EN 12516-3
Valves Design Strength - Part 3 Experimental Method.
Gaskets: The gaskets used in all methods are Spiral Wound to BS4865 for PN rated flanges, and
ASME B16.20 for Class rated flanges. These have Gasket Factors and Design Stresses of 2.5 and
10000psi respectively for Carbon Steel gaskets, and 3.0 and 10000psi for Stainless Steel gaskets as
defined in the 2001(2003 addenda) ASME Boiler and Pressure Vessel Code Section VIII Division 1.
If gaskets are used with higher Gasket Factors and Design Stresses than those stated above, please
consult Flowserve Flow Control (UK) Ltd Technical Sales.