FIELD: plastic processing.
SUBSTANCE: problem solved by the invention is to create a corrugated heat-insulated pipe with improved properties. In corrugated, heat-insulated pipe (22) for liquids, for example for heating main pipelines, at least one inner pipe (2) made of plastic or metal is surrounded by a heat insulating layer (14) consisting, for example, of polyurethane foam. Corrugation (25, 26) of outer sheath (15) made of plastic is designed so that both troughs (25) and crests (26) of the corrugations have a circular shape. Furthermore, the corrugation is of such a size that, with an outside diameter of the pipe of 63-202 mm, depth T of the corrugations lies in the range of 4.5 to 8 mm.
EFFECT: shape and size of the pipe ensure its very good bending and therefore its winding for transportation.
15 cl, 2 dwg
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Year |
Author |
Number |
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2011 |
- B'Jaggi Zhan-Paskal'
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RU2554173C2 |
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1999 |
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|
RU2161575C2 |
| CORRUGATED INSERT FOR PLATE HEAT EXCHANGER |
2009 |
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2020 |
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RU2812695C1 |
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1996 |
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| METHOD OF PRODUCING ANNULAR CORRUGATION TUBES |
0 |
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| POLYVOLUME BELLOWS AND METHOD OF MANUFACTURING THE SAME |
2001 |
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| METHOD FOR PRODUCING LEAF TOBACCO MATERIAL |
2018 |
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RU2753685C2 |
| METHOD OF PRODUCTION OF CORRUGATED PIPE, PREFERABLY FLAME PIPE, TECHNOLOGICAL COMPLEX FOR PRODUCTION OF CORRUGATED PIPES, PREFERABLY FLAME ONES, MACHINE FOR CORRUGATING OF TUBULAR BILLETS, PREFERABLY IN PRODUCTION OF FLAME PIPES, DEVICE FOR LOCAL HEATING WITH HIGH FREQUENCY CURRENTS OF PIPE DURING ROLLING OF ITS FLUTES, CORRUGATED PIPE, PREFERABLY FLAME ONE |
2004 |
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| METHOD OF ROLL FORMING OF CLOSED SECTIONS WITH CHANNELED WALLS |
0 |
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