Blog Category: ASME/MISCELLANEOUS FABRICATION

Sweco Fab., a division of PT&P, fabricated a water treatment vessel from 3/8″ thick SA516 Grade 70 carbon steel for a refining facility in Texas. This pressure vessel has an 84″ outside diameter, is 11′ tangent to tangent and has an overall height of 14′-8″. It is designed for maximum working pressure of 100 psig at 100°F. A radiography test and hydrotest at 130 psig, held for 1 hour was conducted prior to shipment.

Sweco Fab, designed and fabricated a high pressure knock-out drum for a refining company in El Paso, Texas. The pressure vessel was designed according to ASME Section VIII Div. 1 codes with an overall height of 351″ and inside drum diameter of 48″. Its main application is to separate the vapor and liquid in the refining process. It contains a fire proofing skirt and a stainless steel demister pad that aids the separation process. The shell is fabricated from 3/8″ thick SA516 Grade 70 carbon steel, and the forge fittings are fabricated from SA105 carbon steel. The knock out drum has an operation temperature of 450°F at 125 psig, and underwent radiography, dye penetrant and hydro-tests before it was shipped.

Sweco Fab. designed and fabricated storage tanks from 1/4″ thick ASTM A240 grade 304 stainless steel. The tanks are 42″ in diameter, 72″ in overall length and 39-7/8″ in height. The legs are fabricated from SA36 carbon steel. They are designed for 1 PSIG and ambient temperatures. The storage tanks were hydro tested and leak tested for 8 hours prior to shipment.

Sweco Fab, Inc. (a division of PT&P) custom designed a transition piece weighing 6,000 lb. for a facility in Texas. The piece measures 48″ x 72″ x 72″ and is fabricated from carbon steel. It will be used to connect a round water tower to a square duct. Prior to shipping, the product was 100% dye penetrant tested.

Sweco Fab., Inc. designed and fabricated pig launchers and receivers with closure for a crude export pipeline in Mexico. These units were custom designed per ASME CODE B31.3 and weigh 2,400 lb. They are 120″ in length and have 12″ dia. minor barrels and 18″ dia. major barrels. The barrels are fabricated from API 5L Gr. B pipe, the flanges from SA105 and the closures from carbon steel. The launchers are designed for operating temperatures that vary from -20°F to 212°F at 943 psig. They were radiography tested and hydro-tested at 1,415 psig for two hours.

Sweco Fab., a division of PT&P, designed and fabricated this 108″ diameter storage tank that will be submerged inside a containment tank for a chemical plant in Texas. The storage tank is fabricated from 1/2″ thick SA516-70 carbon steel and is 240″ in length. The containment water tank measures 295″ L x 124″ W x 128″ H. The storage tank is designed for 100 PSIG at 130°F internally and 15 PSIG at 130°F externally. The storage tank was hydro tested for 1 hour at 150 PSI and a full radiography test was done prior to shipment.

These screen guides were custom fabricated for a cooling tower at a chemical plant in Texas. These anchor bars are used to secure the screen guides to the concrete. These screen guides are 10″ in width and are 42″ in length. All components were completely fabricated from A36 carbon steel with a galvanized finish. Standard quality control inspections were performed before shipment.

Many plants, such as power, petroleum refineries, metal processing, and other industrial facilities are designed to use open recirculating systems utilizing cooling towers for heat transfer from condensers and other heat exchangers through a process called “latent heat of vaporization.”

Within these cooling towers, screen guides are used in a gravity-flow distribution system where supply water flows or cascades down over successive offset levels of horizontal screens or splash bars into a basin. These guides provide a means by which screens or splash bars are supported from a concrete structure. The screens are intended to lower the temperature of water by causing the water to spread over large areas to promote maximum exposure to airflow as it cascades from the top of the tower into the lower basin. One side of the guide provides a “slot” by which screens or other types of “surfaces” can be installed. The other side of the guides are fitted with bent “strip anchor bars” similar to those used for embed plates. As a manufacturer of embed plates, we also supply these for mining facilities, semiconductor plants, wastewater treatment plants, or any construction site where there is steel attached to a concrete panel or slab.

PT&P REF. ORIGINAL POST 04102017

• Cost effective
• Easy to move
• Compact folding function for storing
• Minimal set-up for convenient access
• Includes bulletproof riot shields rack for placement/storage
• No maintenance required

PT&P designed and fabricated a full coverage bulletproof shield for a company in Texas. This critical defense product is cost-effective, easy to move, compact to store, and convenient to access at a moment’s notice. Each unit includes slots in order to store four bulletproof riot shields. We hope the need never arises; however, this safety product is suited for public spaces such as schools, churches, concerts, public events, government agencies, and functions. The shield can function as a cover for a doorway providing safety to inhabitants while also allowing for mobility enabling persons the ability to exit safely from an unforeseen situation. The key design considerations this shield sought to address were safety of the defense personnel by providing for head to toe protection but also enabling mobility during one onto one incidents.
In addition to our deep technical expertise in the design and manufacturing of supports and expansion joints for piping systems, we have always been able to pivot to build what is the task in the moment by our customers and community. The bulletproof shield showcases our ability to be flexible, think outside of the box, and solve most problems.
Some of our key products, such as the big ton, are a product of this kind of exchange with our customers. We invite you to take a look at your project needs and our scale and capabilities and ask what we can do for you.

View video on this products’ function

View PDF on Personnel Protection Shields

PT&P custom designed, fabricated and provided installation oversight for sixty-five personnel protection shields for a refinery in Texas. The personnel protection shields are used when insulating the line is not necessary, but operating temperatures require safeguarding personnel from coming into contact with the pipe. These shields are fabricated from carbon steel with a two-coat paint system. They are 11” diameter, and range in lengths up to 48”.

Presently, blind flanges are used to provide an airtight cover to various piping systems that include pipelines in the oil industry, heat exchangers, ships, tanks, etc.

Routine maintenance requires the heavy duty blind flange to be removed for cleaning and repairs. However, for these types of flanges, it is quite difficult to disassemble, clean and repair. It typically requires employing a forklift, crane, or other lifting devices. This can require excessive man-hours, and the alignment of the flanges can remain unpredictable.

PT&P introduced a closure flange hinge with specially designed self‐locking bolts and two self-lubricated hinge studs to support the blind flange when all the fastening bolts are removed for maintenance or replacement. The blind flange can be opened like a “door” with little effort. Our product opens up to 180 degrees, providing full accessibility to work on the pipeline, heat exchanger, or other equipment.

To solve the issues, PT&P invented two versions of closure flange hinges for blind flanges: temporary / removable hinge and permanent / fixed hinge

PT&P recently designed 159 permanent and removable hinges for up to 72″ diameters, We can accommodate for larger sizes upon request.

View PDF Handout on Closure Flange Support Hinges