Document 7REeLRQneB44we1J5OwvkxKwa

Insulation Conduit Durant Insulated Pipe Company Demeter Street off Bay Road Palo Alto, California Eastern Division: Durant International Corporation Williamstown, New Jersey REPRESENTATIVES IN PRINCIPAL CITIES DURANT Pre-Sealed INSULATED PIPE APPLICATION D. I. P. is used in underground and weather-exposed locations for conveyance of steam (1 to 1000 psi), hot water, and refrigerants. It is used for new lines, for replace ment of worn-out lines, or for use in an existing tunnel where waterproofing is re quired. It is fabricated, in standard lengths, in pipe sizes up to 24 in. Larger sizes available on order. / SPECIAL FEATURES AND FACTS ON D. I. P. D. I. P. is a pre-sealed insulated conduit that does not depend on a metal jacket for protection from moisture, leakage and corrosion. A 1 in. layer of highmelting-point, non-porous asphalt is the waterproofing protection. By design, Durant's Patented Support ing Ring allows asphalt to flow through openings during fabrication to com pletely encase the ring. Water or mois ture cannot pass through D. I. P. casing to the insulation or pipe. Durant's Patented Insulated Anchor eliminates contact between anchor plate and pipe; reduces heat loss; provides electrical as well as thermostatic insula tion, and eliminates corrosive electro lytic action. Use of D. I. P. affords many other ad vantages--such as low cost installation, for the Durant field joint can be made swiftly and easily. D. I. P. does not re quire external casing-welding; nor does it require concrete tunnels, slabs, rollers, supports, drains or additional protection for superimposed loads--such as under roadways or railroad tracks. D. I. P. systems have an exceptionally long service life. Many a D. I. P. system of over 25 years' service is functioning efficiently today. Durant Insulated Pipe Company Insulation Conduit SfACi* AND tOAD MAXIMO PIPE WITH INSULATION ft SUPPOSTING RINGS IN PLACE DESCRIPTION AND CONSTRUCTION D. I. P. is a prefabricated, factory-built, insulated and waterproofed pipe. It is constructed by first encasing pipe (Bteel, wrought iron, copper, brass or alloys) in Unibestos, molded 85 per cent magnesia, Spongefelt, or other insulation, suffi ciently thick to insure insulation surface temperature not above 150 F. Loose-pack material is not used. Over both pipe and insulation, patented Durant supporting rings are slipped, not more than 36 in. apart. A heavy gage sheet-metal casing, circular in form, is placed around the supporting rings, al lowing a 1 in. (minimum) space between insulation and casing. This space is filled with a high-melting-point, non-porous asphalt. Special methods are used during pouring to obtain thorough distribution of asphalt, eliminate pockets and main tain uniform thickness. D. I. P. conduits are circular in cross-section on all single line units. Multiple pipe systems are either circular or oval, depending on the pipe sizes involved. A variety of standard, prefabricated ac cessory items are available--such as tees, ells, expansion loops, anchors, pipe sup ports, and other items which may be required for completely prefabricated piping systems. Fabrication is made in accordance with shop drawings which must be approved by engineer and con tractor prior to shop fabrication. Units are shipped, marked for assembly in the field, and are accompanied by all materials and instructions for the mak ing of field joints. Durant's engineering staff and representa tives are at your service. Write for recom mendations, estimates, or new Catalog DSS. The packed type end cap is used where conduit terminates in a space such as a manhole or yardbox, or other location where submersion in water can occur and where piping is not anchored at terminal. This type is constructed of a compression coupling packed with a high temperature asbestos gasket. The coupling bolts and sleeve are welded to a heavy gage section of outer casing. This type end cap per mits the pipe to expand and still remain water tight. 1573