Piping Technology & Products, Inc. provided 35 stainless steel stanchions for pipe sizes 4 to 18 inches for a power company in Alabama.
The ends of the stanchions have shop-cut end connections that will allow field welding without any modifications by site personnel. Some stanchions were provided with straight pipe connections and others were provided with elbow connections. The minimum height requirement provided for a centerline height equal to approximately 16″ while the maximum pipe centerline was required to be at approximately 58 ½”. The stanchions were designed at 1100°F and sustained a maximum design load of 18,000 pounds. The stanchion base plates are 304 stainless steel and the tubes are constructed of A240 GR.304 seamless pipe.
Do you need stanchions for your company? Request a quote and get a response within 48 hours!
Piping systems are used to transport gases, liquids and suspended solids between units of a plant. The temperatures of the contents and the pipe when the plant is in operation are often quite different from the ambient temperature of the surroundings. The heat transferred during changes in temperature causes metal pipe to expand and contract. Piping designers must provide for movement due to temperature changes and forces caused by pumps, gravity and other elements of the piping system.Read PT&P’s “How to Size a Spring Hanger” Technical Bulletin for more information.
PT&P Specially Designs and Fabricates Constants for a Radiant-Tube Support System
These constants are an essential component of the radiant-tube support system for a reforming furnace. Piping Technology custom designed these units to fit in the limited space available inside the furnace. The bolting patterns for the constants needed to be flexible enough that they could be attached to the supporting structure with any of the support system designs being considered.
Slide Plates: The “Sandwich” Concept
Piping Technology & Products, Inc. uses the “sandwich” concept when applying slide plates to our customers ‘ systems. Figure 1 shows a “sandwich” composed of two identical slide plates, one on top and another on the bottom. Each slide plate (which is like the bun of the “sandwich”) and a low coefficient of friction material which is bonded to the metal backing plate.
Figure 1
Figure 1
In a typical application a slide bearing plate is welded to a structural steel member which is strong enough to provide the required support, but whose coefficient of friction is too high.
Figure 2
Figure 2 shows an application in which a slide bearing plate is welded on top of one steel beam supporting the other beam. When the top beam moves (due to thermal expansion, for example) it slides across the surface of the bearing plate without contacting the supporting another beam. To return to our “sandwich” metaphor, the top half of the “sandwich” is bonded to the sliding beam, and to the bottom half to the supporting beam.
Want to learn more about spring hangers? Visit our webinar archives today!
Piping Technology & Products, Inc. specially designed and fabricated ten sway braces, with total travel distance of 14, for a petroleum company in Louisiana.
The standard PT&P braces have springs that allow 3 of total travel distance. These sway braces were custom designed to provide total travel distance of 5 and 14. The center-to-center dimensions ranged from 92¼” to 115″ with internal supports to prevent buckling. The desired spring rates for the sway braces were 450 lb./in. and 1350 lb./in. The custom sway brace assemblies comprised of pipes (for spring housing), springs (sizes dependent on spring rate and total travel) and in some cases, ball joints.
Do you need sway braces for an upcoming project? Request a price quote today!
Pipe Shoes For 14" Pipe At A LNG Plant Pipe Shoes For 14" Pipe
Piping Technology & Products, Inc. fabricated cryogenic pipe supports designed for a 14-inch pipe at a LNG plant in Algeria. The pipe operates below minus 50 degrees F, therefore the pipe supports were fabricated from three different materials in order to accommodate the low temperatures. The upper part, which clamps on to the pipe, was fabricated from a stainless steel plate that retains its strength at low temperatures. The middle section is a laminated phenolic block made from layers of wood impregnated under vacuum with a synthetic resin. A crossed orientation of the hard wood fibers is used to provide extra strength. The laminated phenolic block, which is a poor conductor of heat, was bolted to the bottom plate of the galvanized carbon steel.
Are you in need of some cryogenic pipe supports for an upcoming project? Get pricing today!
Piping Technology & Products, Inc. specially designed and fabricated Big Ton Variable Springs for a chemical project in Canada. The supporting beams are 30″ in length with PTFE, 25% glass filled stainless steel slide plates. The Big Ton Springs were designed with six coil springs with external guides to prevent horizontal twisting and internal guides to withstand horizontal friction forces. These units were also designed for operating loads from 260,000 to 350,000 Newtons and hydro-test loads from 300,000 to 450,600 Newtons. A total of six units were painted with a special finish specified by the client.
Piping Technology & Products, Inc. custom designed and fabricated 1,728 rods and clevises for a heat recovery steam generation plant. The rods and clevises will be utilized to support various pipe loads throughout the piping system.
Learn more about rods and clevises by visiting our webinar archives!
Type F Variable Springs With Specially Made Locking Devices
Piping Technology & Products, Inc. specially designed twelve Type-F variable spring hangers (4-160-F, 8-170-F, 8-180-F) for an oil refinery in Indiana. These variable spring hangers were custom designed to support a Hydro-Test load 4.5 to 5 times the design load, which ranged from 7,988 lb. to 13,075 lb. The spring rates of the variable spring hangers ranged from 500 lb./in. to 750 lb./in. with travels of 1.15″ to 2.82″, upward movement respectively. The locking devices for these springs were manufactured using basic materials (rods, hex nuts and heavy pipe wall) and a special pressure plate to accommodate the application design criteria requested by the client. The base plate designed for these F- Type cans were modified to accommodate the locking devices.
Learn more about variable springs by visiting our webinar archives!
U-Type and F-Type Constant Spring SupportsF-Type Constants
Piping Technology & Products, Inc. designed, manufactured and delivered a total of 8 constants to a power plant in Mexico. The designs consisted of 4 Horizontal U-Types Upthrust (Figure 1) and 4 Vertical F-Types (Figure 2) that are to support 24-inch diameter pipes. Each consisted of different sizes. The constants are designed for loads of 2,839 lbs. to 8,963 lbs., for Total Travels ranging from 7 to 3 inches. Constants were painted CZ-11 per customer request.
Learn more about constant springs by visiting our webinar archives!
PT&P specially designed and manufactured a heavy duty, 40-inch diameter, alloy yoke clamp (cut from a 6″ thick plate) for a Power Plant in Mississippi. The clamp was designed for a 70,000 lb load and is to support a 40″ diameter, high pressure main steam line. The u-bolt was made of a 3″ diameter bar. In order to prove the design of this clamp, Finite Element Analysis was used to simulate the loads and stresses that it may experience in the field. The model shows the stresses at every point by a color coding system.
Want to learn more about yoke clamps and other types of clamps? Visit our webinar archives today!
Custom Pipe Support Assemblies For An Oil Refinery In MexicoCustom Pipe Support Assemblies
Piping Technology and Products designed and built 24 custom pipe support assemblies to meet the unusual needs of an oil refinery in Mexico. The pipe hanger assemblies each consisted of a 200 E-type constant spring support and a cradle assembly. The constants are designed for loads of 9856 lb. to 13,288 lb., and for total travels ranging from 3.5″ to 5.5″. Operational conditions dictated that the constant springs have settings for emergency and start-up, in additional to the standard settings of cold for shipping, and hot for normal operations.
The cradle assemblies attached to the constants are to support pipes with operational temperatures of 1070°F to 1100°F. Thus while the constants could be made of A-36 steel, the assemblies could not. The pipe saddle itself was made by splitting a section of A387-11 chrome alloy pipe. The other support components were all made of 304 stainless steel. This includes a 1-3/4″ Eye Rod, two 27″ I.D. U-bolts, and two 33″ lengths of 3″ diameter SCH. 80 pipe.
Do you need custom pipe supports for an upcoming project? Get pricing today!
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