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Revision Indication
STANDARD SPECIFICATION
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
3-35-3
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MIST ELIMINATORS
1.
Page 1
GENERAL 1.1 Scope a.
This Standard Specification covers the general requirements for design, construction, fabrication, and material of Mist Eliminators specified in UOP Project Specifications.
b.
Exceptions or variations shown in the UOP Project Specifications take precedence over requirements shown herein.
1.2 References Unless noted below, use the edition and addenda of each referenced document current on the date of this Standard Specification. When a referenced document incorporates another document, use the edition of that document required by the referenced document.
2.
a.
American Society for Testing and Materials (ASTM) A-478, Specification for Chromium-Nickel Stainless and Heat-Resisting Steel Weaving and Knitting Wire.
b.
ASTM B-164, Specification for Nickel-Copper Alloy Rod, Bar, and Wire.
DESIGN 2.1 General a.
Size, style, thickness, configuration, and materials are specified in UOP Project Specification 301 – Vessels.
b.
Mist Eliminator styles are defined as follows:
STYLE
MATERIAL
A
G
Metallic Metallic Metallic Polytetrafluroethylene (PTFE) Polyethylene Polypropylene Metallic
V
Metallic
B C D E F
Form QUA-03-5
DENSITY lb/ft3 (kg/m3)
9 (144.2) 5 (80.1) 12 (192.2) 4 (64.1) 3 (48.1) 2.6 (41.7) Variable 5 (80.1) - 9 (144.2) By Vendor
WIRE DIAMETER inches (mm)
0.011 (0.28) 0.011 (0.28) 0.011 (0.28) 0.011 (0.28) 0.012 (0.30) 0.012 (0.30) 0.011 (0.28) By Vendor
Revision Indication
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
STANDARD SPECIFICATION 3-35-3
Page 2
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MIST ELIMINATORS
c.
Style G is a mesh blanket having a variable knitted density. The vapor inlet section is the least dense and the outlet section the densest. Typical inlet/outlet knitted mesh densities are 5 lb/ft3 (80.1) and 9 lb/ft3 (144.2). The vendor may propose variable density blankets having slightly different knitted densities and wire diameters.
d.
Style V is to be determined by the vendor, based on the process conditions provided by UOP. Vendor may determine the mist eliminator type best suited to meet the mist elimination requirement. The selected style may include a mesh pad, vane or a combination of mesh & vanes. The mist eliminator may be oriented vertically, horizontally or at an angle determined by the vendor. A single pad of variable knitted density may also be applied.
2.2 Construction a.
Mist Eliminators shall be fabricated in one piece or in the minimum number of sections required for insertion through the vessel manway.
b.
Mesh pads shall fit tightly into the pad containment system.
c.
Mesh pad layers shall not be more than 9 inches (230 mm) thick. Where more than one layer is required, ts shall be staggered.
d.
One-piece circular mesh pads may be spiral in form.
2.3 s and Grids a.
The general arrangement of Mist Eliminator s and grids shall be as specified in UOP Project Specification – 301 and the referenced UOP Standard Drawings.
b.
Final details of Mist Eliminator s and hold down grids shall be furnished by the Mist Eliminator supplier.
c.
The Mist Eliminator supplier shall furnish details of components attached to the vessel to the vessel fabricator in time to permit installation without altering the vessel fabrication schedule.
d.
Each section of the mesh pad shall include a grid on each side.
e.
Style G mesh pads shall be furnished with an inlet and an outlet rigid welded grid. The outlet grid and blanket outlet zone of the Style G mesh pad shall be distinctly marked “Outlet”.
f.
Spiral mesh pads shall include X-type grids on both sides.
2.4 Fastening Devices The Mist Eliminator fabricator shall supply wire ties or other devices to fasten the Mist Eliminator sections to the s, attach the grids to their vessel s, and where multiple layer Mist Eliminators are necessary, to secure the layers together.
Form QUA-03-5
Revision Indication
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
MIST ELIMINATORS
3.
STANDARD SPECIFICATION 3-35-3
Page 3
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MATERIALS 3.1 Metallic Mesh Pads Materials for metallic Mist Eliminators are specified in UOP Project Specification 301 – Vessels. Type 304 or Type 316 mesh pads shall be in accordance with ASTM A-478. Monel mesh pads shall be in accordance with ASTM B-164. 3.2 Non-metallic Mist Eliminators Non-metallic Mist Eliminators shall be PTFE, polyethylene or polypropylene as specified in UOP Project Specification 301 – Vessels. 3.3 s a.
s welded to the vessel shall be the same material as the shell. Where the shell is lined, s welded to the lining shall be the same material as the lining.
b.
s not welded to the shell (e.g. beams) shall be the same material as the Mist Eliminator.
3.4 Grids a.
Metallic grids shall be the same material as the mesh pad.
b.
For non-metallic mesh pads, the grids shall be carbon steel, coated with the same material as the mesh pad.
3.5 Fastening Devices
Form QUA-03-5
a.
For metallic mesh pads the wire ties or other fastening devices shall be of the same material as the Mist Eliminator.
b.
For non-metallic mesh pads the wire ties or other fastening devices shall be carbon steel coated with the same material as the mesh pad.
STANDARD SPECIFICATION
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
3-35-3
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MIST ELIMINATORS
1.
Page 1
GENERAL 1.1 Scope a.
This Standard Specification covers the general requirements for design, construction, fabrication, and material of Mist Eliminators specified in UOP Project Specifications.
b.
Exceptions or variations shown in the UOP Project Specifications take precedence over requirements shown herein.
1.2 References Unless noted below, use the edition and addenda of each referenced document current on the date of this Standard Specification. When a referenced document incorporates another document, use the edition of that document required by the referenced document.
2.
a.
American Society for Testing and Materials (ASTM) A-478, Specification for Chromium-Nickel Stainless and Heat-Resisting Steel Weaving and Knitting Wire.
b.
ASTM B-164, Specification for Nickel-Copper Alloy Rod, Bar, and Wire.
DESIGN 2.1 General a.
Size, style, thickness, configuration, and materials are specified in UOP Project Specification 301 – Vessels.
b.
Mist Eliminator styles are defined as follows:
STYLE
MATERIAL
A
G
Metallic Metallic Metallic Polytetrafluroethylene (PTFE) Polyethylene Polypropylene Metallic
V
Metallic
B C D E F
Form QUA-03-5
DENSITY lb/ft3 (kg/m3)
9 (144.2) 5 (80.1) 12 (192.2) 4 (64.1) 3 (48.1) 2.6 (41.7) Variable 5 (80.1) - 9 (144.2) By Vendor
WIRE DIAMETER inches (mm)
0.011 (0.28) 0.011 (0.28) 0.011 (0.28) 0.011 (0.28) 0.012 (0.30) 0.012 (0.30) 0.011 (0.28) By Vendor
Revision Indication
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
STANDARD SPECIFICATION 3-35-3
Page 2
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MIST ELIMINATORS
c.
Style G is a mesh blanket having a variable knitted density. The vapor inlet section is the least dense and the outlet section the densest. Typical inlet/outlet knitted mesh densities are 5 lb/ft3 (80.1) and 9 lb/ft3 (144.2). The vendor may propose variable density blankets having slightly different knitted densities and wire diameters.
d.
Style V is to be determined by the vendor, based on the process conditions provided by UOP. Vendor may determine the mist eliminator type best suited to meet the mist elimination requirement. The selected style may include a mesh pad, vane or a combination of mesh & vanes. The mist eliminator may be oriented vertically, horizontally or at an angle determined by the vendor. A single pad of variable knitted density may also be applied.
2.2 Construction a.
Mist Eliminators shall be fabricated in one piece or in the minimum number of sections required for insertion through the vessel manway.
b.
Mesh pads shall fit tightly into the pad containment system.
c.
Mesh pad layers shall not be more than 9 inches (230 mm) thick. Where more than one layer is required, ts shall be staggered.
d.
One-piece circular mesh pads may be spiral in form.
2.3 s and Grids a.
The general arrangement of Mist Eliminator s and grids shall be as specified in UOP Project Specification – 301 and the referenced UOP Standard Drawings.
b.
Final details of Mist Eliminator s and hold down grids shall be furnished by the Mist Eliminator supplier.
c.
The Mist Eliminator supplier shall furnish details of components attached to the vessel to the vessel fabricator in time to permit installation without altering the vessel fabrication schedule.
d.
Each section of the mesh pad shall include a grid on each side.
e.
Style G mesh pads shall be furnished with an inlet and an outlet rigid welded grid. The outlet grid and blanket outlet zone of the Style G mesh pad shall be distinctly marked “Outlet”.
f.
Spiral mesh pads shall include X-type grids on both sides.
2.4 Fastening Devices The Mist Eliminator fabricator shall supply wire ties or other devices to fasten the Mist Eliminator sections to the s, attach the grids to their vessel s, and where multiple layer Mist Eliminators are necessary, to secure the layers together.
Form QUA-03-5
Revision Indication
Note: The information in this document is confidential and the property of UOP LLC and must not be disclosed to others or reproduced in any manner or used for any purpose whatsoever without its written permission.
UOP LLC 25 East Algonquin Road Des Plaines, Illinois 60017-5017 USA
MIST ELIMINATORS
3.
STANDARD SPECIFICATION 3-35-3
Page 3
of
3
DATE
STATUS
APVD
AUTHD
28MAR12
Revised
JAB
RGP
MATERIALS 3.1 Metallic Mesh Pads Materials for metallic Mist Eliminators are specified in UOP Project Specification 301 – Vessels. Type 304 or Type 316 mesh pads shall be in accordance with ASTM A-478. Monel mesh pads shall be in accordance with ASTM B-164. 3.2 Non-metallic Mist Eliminators Non-metallic Mist Eliminators shall be PTFE, polyethylene or polypropylene as specified in UOP Project Specification 301 – Vessels. 3.3 s a.
s welded to the vessel shall be the same material as the shell. Where the shell is lined, s welded to the lining shall be the same material as the lining.
b.
s not welded to the shell (e.g. beams) shall be the same material as the Mist Eliminator.
3.4 Grids a.
Metallic grids shall be the same material as the mesh pad.
b.
For non-metallic mesh pads, the grids shall be carbon steel, coated with the same material as the mesh pad.
3.5 Fastening Devices
Form QUA-03-5
a.
For metallic mesh pads the wire ties or other fastening devices shall be of the same material as the Mist Eliminator.
b.
For non-metallic mesh pads the wire ties or other fastening devices shall be carbon steel coated with the same material as the mesh pad.
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