Constants For Constricted Areas of a Chemical Processing Plant
Piping Technology & Products, Inc. custom designed and fabricated 200-C type constants to suit constricted areas of a chemical processing plant in Texas.
Short distances between the pipe and the supporting beam necessitated a custom design. Two designs were needed one was for a 230 lb. load with 11″down travel, while the other was for a 260 lb. load with 13-1/2″ down travel. The PT&P standard design for these constants has Take-Out values of 19-9/16″ and 21-9/16″, respectively. However, the available space permitted no more than 9-1/2″.
Compare the final design, shown on the left to the standard design, shown on the right. Note that the lower part of the frame has been cut away, permitting the pipe to move nearer to the constants’ supporting lugs.
PT&P’s system of stock pipe and spring supports, allowed engineers and workers to fabricate these constants within a short amount of time.
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Cylinder Pipe Guides
Cylinder Pipe Guides
Piping Technology & Products, Inc. designed and manufactured cylinder pipe guides for an energy center in Canada.
These guides, which are frequently referred to as spider guides, are designed to control lateral pipe movement and maintain the alignment of the piping through its axial and contraction cycles. A single piping run uses spider guides in number to avoid a fulcrum or an imposed lateral deflection on critical components.
These spider guides were designed for pipes ranging from 1″ to 20″ diameter with 1″ to 4″ of insulation. The components include carbon steel plates, stock clamps, angles and green-primer coated pipes. The outer shields have diameters ranging of approximately 6″ to 29-1/2″ with a bottom-of-angle to center-of-pipe dimensions of 3-1/8″ to 15-3/4″. The maximum design temperature for the spider guides is 750°F.
Cylinder Pipe Guides for a Power Plant
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40 Clamp Attachments for a Petrochemical Plant
The clamp attachments shown are used for supporting vertical pipe sections to vessel clip anchors. These braces are designed for a maximum horizontal moment of 15,000 ft-lb at the vessel clip. All the clamps provided were made of carbon steel with a hot-dip-galvanized finish. The pipe hanger assembly lengths were fabricated per specifications provided by the client.
The clamp components were designed and fabricated for non-standard pipe diameters (i.e. 13-3/4″, 16-1/2″) so that they could be used on insulated or finned pipelines.
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Piping Technology & Products, Inc. designed and manufactured 70 horizontal, C-type constants for a furnace application located in Venezuela.
The sizes of the Figure 200 constants ranged from 32 to 64, with a total travel of 4.5 to 10.5, and loads varying from 1,149 to 5,149 pounds. The constants are provided with a custom designed PT&P Figure 270, which consists of a double lug horizontal traveler versus a single lug. Within the horizontal travel, the constants are designed to handle 8 of horizontal movement and support a rod that remains vertical throughout pipe movement.
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