CS236953B1 - Layered chemically and strength resistant pipes - Google Patents

Abstract

Layered chemically and strength-resistant pipeline with increased impermeability, in the shape of a hollow cylinder, created by a combination of hand-laying and machine-winding technologies of glass laminate, consisting of three layers, of which the inner layer is formed by radial and/or cross-winding of glass fiber saturated with highly chemically resistant resin based on epoxy acrylate, bisphenol or vinyl ester type with the content of low-weight fleece based on thermoplastics or chemically resistant enamel and mats of glass strands, the middle layer is formed by cross- and radial alternating winding of glass fiber saturated with less chemically resistant resin based on isophthalic or orthophthalic type, the jacket is formed by winding of glass fiber saturated with highly chemically resistant resin based on epoxy acrylate type, or bisphenol or vinyl ester type.

Description

BACKGROUND OF THE INVENTION The present invention relates to a layered, chemically and rigidly resistant, impermeable pipeline that comes into contact with chemically aggressive fluids or other materials, and resists all chemical aggressive materials except those of the invention.

There are known pipes for conducting chemically aggressive fluids made of material of various kinds resistant to different degrees of aggressiveness, glass or ceramic materials, stainless steel or plastics of various compositions, or pipes provided with a coating of suitable material resistant to this aggressive substance. aggressiveness. The disadvantage of these types of pipes is that, for example, glass pipes are brittle and poorly resistant to temperature changes, ceramic pipes are also brittle and porous and aggressive liquid penetrates the wall to the surface, stainless steel pipes are only suitable for certain types of aggressive substances or liquids as well as pipes of some plastics such as PVC, PE.

The present invention is based on the fact that the hollow-cylindrical pipe consists of a combination of hand-laying technology and machine winding of a fiberglass consisting of three layers, the inner layer of which It consists of a radial and cross-shaped glass fiber saturated with a highly chemically resistant resin based on epoxy-acrylate, bisphenolic or vinilester type containing a low-weight thermoplastic or non-chemically resistant glass fiber mat and glass fiber mat, the middle layer consisting of alternating cross and radial winding saturated with a less chemically resistant resin based on isophthalic or orthophthalic type and a sheath consisting of a glass fiber coil saturated with a highly chemically resistant resin based on epoxy diacrylate, bisphenolic n or a vinilester type, wherein the inner layer has a wall thickness greater than the thickness of the outer shell and at the same time is smaller than the thickness of the middle layer.

236 9S3

The main advantages of layered chemical and strength resistant pipes with increased impermeability according to the invention are that in the inner cavity at the point of contact with an aggressive substance a lining is formed with a maximum layer of highly chemically resistant resin adequately reinforced with several layers of suitable mesh with perfect resistance to aggressive substances even under overpressure in an amount of 25 ^ 50% based on the weight of the inner pipe layer.

The outer sheath consisting of a radial winding of glass fiber saturated with highly chemically resistant resin creates a negative prestressing on the outer surface, which positively affects the resulting stress and allows to optimally reduce the wall thickness or possibly allow higher pressures. A suitable combination of individual layers of glass fiber increases the strength of the structure, ensuring its self-supporting and resistance to external and internal static and dynamic forces.

In the accompanying drawing, an exemplary embodiment of a portion of a layered chemically and rigidly resistant pipeline with increased impermeability is shown in longitudinal axial section.

The pipe consists of three layers, of which layer 3 is a radial and cross winding of a glass fiber saturated with a highly chemically resistant resin based on epoxy-acrylate, bisphenolic or vinilester type containing a low-weight thermoplastic or chemically resistant enamel based fleece;

25%, 50%, based on the weight of the inner layer 2 »of the middle layer 1 consisting of an alternating radial and cross winding of a glass fiber saturated with a less chemically resistant resin based on isophthalic or orthophthalic type and a sheath 2 consisting of a glass fiber winding a highly chemically resistant resin based on epoxy diacrylate, bisphenolic or vinilester type.

Example 1

Piping d 800 mm designed for the construction of a collector of chemically aggressive water or for waste water from industrial plants that are chemically aggressive. On the mandrel provided with a separating layer, for example cellophane, an inner liner layer is applied, which consists of a layer of highly chemically resistant resin CHS 221, CHS 222 / ie based on epoxy diacrylate type or bisphenolic, vinilester type / reinforced with two layers.

236953 surface web of polyester fibers with a weight of 30 g / m and one layer of glass mat of chopped strands .gramáže 300- 450 g / m ² / EC Tyn 22 / 3OO-45o / 85 /. This mat forms a transition barrier of the lainer which is thus formed having a thickness

- inner walls 1.5 to 2.5 mm. The central part of the pipeline consists of an alternating cross and radial winding of glass fiber / roving EC 13/136 tex / 18/651 / saturated with less chemically resistant CHS 141 or CHS 11.6 (also based on violet or orthophthalic type), where the middle layer thickness is 7 mm. The outer casing of the pipeline consists of a radial winding of glass fiber / roving EC 13/136 tex / 18/651 / saturated with a highly chemically resistant resin CHS 221, CHS 222, CHS 161 / based on epoxy-acrylate, bisphenol or vinilester type), 1.2 to 1.5 mm.

Example 2

Pipes with diameter / 1000 mm, 1200 mm, / 1500 mm designed for urban waste water or draining of chemically aggressive substances have produced inner layer and outer sheath in the same way as in example 1, the thickness of the middle part of the pipeline changes by increasing the number of glass fibers impregnated with a less chemically resistant CHS 141 or CHS 116 resin so that the middle section thickness is 1000 mm and / 1200 mm, and the pipe / 1500 is 10 mm.

Example 3

A pipe with a diameter of 2200 mm, intended for the removal of chemically aggressive substances or urban waste water, is produced in the same way as in Example 1, the thickness of the middle part of the pipe being in the range of 6 mm to 70 mm. This thickness of the central part is given by the way of laying in the ground, when in the case of concreting min. th. 6 mm, in case of pipeline installation directly into the ground, this thickness is dimensioned to the soil pressure and can be up to 70 mm according to its own design.

Claims (2)

SUBJECT OF THE INVENTION 23B 953 Laminated Chemical and Strength Resistant Pipes with increased hollowness, hollow cylinder shape, formed by a combination of hand-laying technology and machine winding of fiberglass, characterized by three layers of which the inner layer (3? Is formed by radial and cross-over) winding a glass fiber saturated with a highly chemically resistant epoxyacrylate, bisphenol or vinilester type resin containing a low weight thermoplastic nonwoven or chemically resistant glass fiber mat and a 25% to 50% glass fiber mat, based on the weight of the inner Wtfjjyy O), middle layer ( (l) consisting of less chemically resistant resins based on the isovoltaic or orthophthalic type and the shell (2) Comprising of more chemically resistant resins based on epoxy diacrylate, bisphenolic or vinilester tyDU, the ratio of the individual coil thicknesses being 2.5: 6: 1.5 to 4: 70: 1.5