Chemical Engineering May 2021 - 46

Minncast, Inc.
supplied via certified material-test reports
and
required inspections
from
accredited bodies.
7. Urea facilities are not identical to each
other, but there is some commonality.
Being able to apply lessons learned from
one site at another can be helpful.
8. Make sure that your valve source provides
excellent customer support, providing
timely and professional advice, testing
and service.
9. Stay informed about best practices in
SSVs in order to make the wisest possible
SSV specification choices possible. n
Edited by Mary Page Bailey
Reference
1. IMOA, " Practical Guidelines for the Fabrication of Duplex Stainless Steels, " 3rd
Edition, 2014.
FIGURE 5. Duplex stainless steel (DSS) is created in a foundry.
Because DSS is a high-performance specialty material, it can
be expensive to produce
Conval, Inc.
sive media and the valve mode of operation
(manual, gear, motor, pneumatic
and so on).
2. Recognize and adhere to applicable national
and regional codes and standards, in
addition to any site-specific requirements.
3. Know where in the plant or process the
valve is to be installed and the degree of
need for specialty material. Note that not
all applications will require specialty materials.
Understanding such requirements will
help to avoid unnecessary additional costs
associated with specialty materials.
4. Acknowledge that urea-handling processes
are severe-service applications that
are subject to corrosive media and high
pressures. The nature of urea applications
can lead to the need for repair, so valves
should be easily maintainable,
preferably inline.
Replacement parts
should be easy to order
with prompt delivery.
Repair should not
be complicated.
5.
FIGURE 6. This ball valve is configured with top-entry
accessibility and in-line renewablility, both of which are
useful in urea service
46
There needs to be
flexibility in valve design
when replacing older
valves (for instance,
matching face-to-face
dimensions that are proprietary
or not to current
standards).
6. Confirm and verify
the materials being
Authors
Don Bowers is the vice president of Conval
Inc. (96 Phoenix Avenue, Enfield, CT 06082;
Email:
dbowers@conval.com,
Phone:
860749-0761;
Website: www.conval.com), a manufacturer
of severe-service valves for demanding
industrial applications. Bowers' experience
and knowledge base spans almost four decades
in the thermal-power and severe-service
valve industry. His career has included positions
at Graver Energy Systems, Bechtel Power,
Crane, Velan, Weir and Conval. He is a member of ASME; chairman of
ASME Standards Committee IX; a member of the ASME SCIX's Subgroup
General Requirements and Subgroup Welding Qualifications;
and past chairman and member of the National Board Inspection
Code's Subcommittee on Overpressure Protection (NBIC-SCOP). He
also serves on the Valve Manufacturers Association's Valve Magazine
Editorial Review Board.
Jennifer Jones is the urea industry market
lead at Armour Valve Ltd. (126 Milner Avenue,
Toronto, Ont., Canada M1S 3R2, Email: jjones@
armourvalve.com,
Phone:
416-299-0780,
Website: www.armourvalve.com), a Canadian
provider of industrial valves, specialty equipment
and support services to industrial users.
Jones is a Professional Engineer with over 20
years of experience in technical sales. She
started her career in Armour Valve's Inside
Sales department, which gave her an understanding of the technical
and commercial factors that that impact product selection. In her current
role as strategic accounts & pricing manager and as Armour
Valve's market lead for the fertilizer industry, she works with end
users, consultants and manufacturers to provide optimal solutions for
critical applications.
Further reading on chemengonline.com
1. Waters, R., Selection of Severe Service Valves, Chem.
Eng., June 2017.
2. Khiani, G., Valves: Emissions Standards and Current
Practices, Chem. Eng., October 2017.
3. Intratec Solutions, Technology Profile: Urea Production from Ammonia
via a Self-Stripping Process, Chem. Eng., July 2017.
4.
Herrera,
July 2015.
5. LePree, J., Increasing the Reliability of Valves Through Design,
Chem. Eng., August 2019.
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM MAY 2021
R., Valve-Selection Best Practices, Chem. Eng.,
http://www.conval.com http://www.armourvalve.com http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM
Chemical Engineering May 2021

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