Design; Storage - Flowserve Worcester V-Flow 53 Series User Instructions

3.2

Design

a) End flanges: The end flange design of this product has been verified by either
2017 ASME BPVC Section VIII Division 1 – Calculation Method, by finite element
analysis in accordance with 2017 BPVC Section VIII Division 2 – Alternative Rules,
or by experimental testing as defined in BS EN 12516-3 – Experimental Method.
b) Bolting: End flanges have been verified by the methods stated above, using bolt
design stress valves based on those for ASTM A193 B8 Class 2 for stainless steel
valves and ASTM A320 L7 for carbon steel valves as defined in ASME BPVC
Section II Part D.
c) Gaskets: Spiral wound gaskets in accordance with BS EN 1514 for PN rated
flanges and ASME B16.20 for Class rated flanges. These have gasket factors and
design stresses of 2.50 and 69 MPa respectively for carbon steel gaskets, and 3.00
and 69 MPa respectively for stainless steel gaskets as defined in 2017 ASME BPVC
Section VIII Division 1. If gaskets with higher gasket factors and design stresses are
used, please consult Flowserve Flow Control technical sales.
d) Lethal Service: In accordance with ASME BPVC Section VIII Division 1, a casting
quality factor of 1.0 is allowable for all products. Those intended for 'lethal
service' must have had non-destructive examination carried out in accordance
with Appendix 7 of ASME BPVC Section VIII Division 1. Refer to Flowserve Flow
Control technical sales for more information.
4

Storage

a) All valves are despatched in the open position and it is recommended that they
are left in this position during storage.
b) All protective packaging should remain in this position until the valve is to be
installed.
c) Valves should be stored in a clean, dry environment.
d) Carbon steel valves are phosphate and coated with a de-watering oil. This
coating is non-toxic and is quite safe on edible or potable products.
Worcester V-Flow 53 / 54 Series User Instruction – WCENIM0027-01
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