DURALOY TECHNOLOGIES, INC. | PETROCHEMICAL APPLICATIONS

petrochemical

steel mill products

commercial heat treating

specialty products

super plastic forming tools

Petrochemical

Duraloy manufactures products for two major areas of the petrochemical market - cracking furnaces (pyrolysis) and reforming (gases). Our products range from tubes and fittings to completely fabricated coils, catalyst tubes, and headers. Follow the links below to see some of our products in:

Cracking Furnaces (Pyrolysis)

Reforming Furnaces

Petrochemical > cracking furnaces

Ethylene
Automatic TIG Welding
Petrochemical Elbows
Tube Sheets
Ethylene Pyrolysis Hairpins
Small Diameter Tubes

Centrifugal Cast Tube Stanchions
Small Tube Supports
Petrochemical Furnace Hooks
Supertherm Coils
Spacer Blocks
Tube Hangers

		ETHYLENE PYROLYSIS (cracking) COILS Duraloy also has a long history of manufacturing high quality ethylene pyrolysis and other process coils. Depending on the application, Duraloy has manufactured coils in alloys such as MO-RE-10MA^®, MO-RE-40MA^®, Supertherm^®, HK-40 and CY-40 alloys. The coils, which are made up of a variety of centrifugal tubes and static castings welded to form a coil, are fully fabricated and tested in our Scottdale, PA facility. back to top


		AUTOMATIC TIG WELDING Many of Duraloy's petrochemical weld joints are produced using our state-of-the-art automatic TIG welding equipment. Duraloy uses the Dimetrics "Gold Trac^®" Dual-Sync Pulse Automatic TIG Welding System. This welding system employs a computer-controlled dual wire feed that increases weld deposition by about 30% per pass, thus reducing welding times and reducing heat input into the weld joint. This process has also reduced the weld repair rate to almost zero. Duraloy has recently purchased matching orbital equipment to make the tube-to-fitting "closure" welds. back to top


		PETROCHEMICAL ELBOWS These elbows are statically cast in a variety of petrochemical alloys, like Duraloy's proprietary alloys MO-RE-10^®, MO-RE-10MA^®, MO-RE-40MA^® and TMA 6300^®. The elbows are cast then machined with a weld prep bevel prior to being high-pressure hydro tested and LPI inspected. If all the tests and dimensions are acceptable per the specifications, the elbows are sent to the fabrication department for welding into coils, crossovers, etc. Also, as required by the customer, some are sent loose to serve as the customers spares. back to top


		TUBE SHEETS This tube sheet is to be used in the convection section of a polypropylene furnace. The large flange across the bottom will be drilled with bolt holes and bolted to a structural member on the floor of the furnace then have tubes threaded through the holes and laid across the top of the support. The tube sheet insures that the tubes will maintain even spacing in service allowing the heat from the furnace to circulate evenly around the tubes. back to top

		This tube sheet is to be used in the convection section of an ethylene furnace. The large flanges on both sides will be used to secure the casting into the walls of the furnace. The user will then have tubes threaded through the holes and laid across the top of the support. This tube sheet is made in HK-40 alloy. back to top


		ETHYLENE PYROLYSIS (cracking) HAIRPINS These are fabricated sub-assemblies that are to be installed in an ethylene pyrolysis furnace. The "hairpins" are made up of two, long tube assemblies with a 180 degree return bend fabricated onto one end of two tubes. A guide pipe is then fabricated onto the return bend. Typically these assemblies are cast in an alloy that exhibits good resistance to carburization, like Duraloy's proprietary alloys MO-RE-10^®, MO-RE-40^® or MO-RE-40MA^®. back to top


		SMALL DIAMETER TUBES With our new "state-of-the-art" centrifugal spinner, Duraloy is now able to produce tubes with bored I.D.'s as small as 1.80"(46mm) and wall thicknesses down to 0.25"(7mm). While most of the applications for these small tubes are in the petrochemical industry, there are many other uses for these tubes. They can also be used for small rollers for automatic shotblasters, furnace supports and tube guides. back to top


		CENTRIFUGAL CAST TUBE STANCHIONS Duraloy produces these tube stanchions which are used in furnaces to support process gas tubes. The stanchions are centrifugally cast, then have 1" (25mm) square holes milled through the tubes. HK-40 pins or then cast and inserted through the tubes to for a "ladder" effect. The base of the stanchions are inserted into holes in the furnace floor and the process tubes are threaded through the "rungs" of the stanchion. These stanchions are cast in ASTM A297, Grade HK-40 alloy. back to top


		SMALL TUBE SUPPORTS Duraloy can produce tube supports in all sizes, from smaller ones, like the supports shown here, to very large castings. All of our tube supports are capable of meeting very stringent NDT requirements. Some supports only require LPI on the surfaces, but others require radiography of critical areas to insure sound castings. In addition to manufacturing the castings, Duraloy also performs the NDT in-house. Duraloy can produce tube sheets up to 12 feet (3.65 meters) in length and up to 4.5 feet (1.38 meters) in height. Typical tube support alloys include HK-40, ASTM A297 Grade HH and Duraloy's proprietary alloys 22H^® and Super 22H^®. back to top


		PETROCHEMICAL FURNACE HOOKS These hooks, cast in Duraloy's proprietary alloy Super 22H^®, are used in petrochemical furnaces to hold tubes, assemblies, etc. The long flange part of the hook is put through a hole in the top of the furnace and pinned in place. The hook portion is suspended in the furnace and can be used to support a variety of components. These hooks must pass a very critical radiographic inspection to insure internal soundness. back to top


		SUPERTHERM^® COILS These coils, destined for Saudi Arabia, are cast and fabricated in Duraloy's proprietary Supertherm^® alloy. Supertherm^® is used in services that are unusually high in operating temperature. These coils are cast, bored, welded, radiographed pneumatic tested and trial assembled in our shop in Scottdale, Pennsylvania. back to top


		SPACER BLOCKS These statically cast blocks are used in a fashion similar to tube support sheets. Cast in a variety of heat resistant alloys, spacer blocks are placed between tubes installed in a high temperature furnace to prevent the tubes from coming into contact with each other during use. back to top


		TUBE HANGERS These hangers are bolted to the inside walls of a cracking furnace and are used to support tubes while in service. The hangers are to provide support for the tubes, which at high temperatures, have a tendency to sag or droop, causing premature failures in the tubes. These hangers are cast in HK-40 alloy. back to top

duraloy^®, THE DURALOY LOGO, MO-RE^®, SUPERTHERM^®, TMA^®, 22H^®, and Super 22H^® are registered trademarks of Duraloy Technologies, Inc., in the United States, Canada and the European Community. All Rights Reserved.