Main line Composition of the polyurethane coating steel preinsulated pipe
equipment:
| No. | name |
| 1 | External wall Shot blasting rust removel machine |
| 2 | Medium-frequency induction heating furnace |
| 3 | Polyurethane spray foaming unit |
| 4 | pipe rotator trolley |
| 5 | Single screw extruder and diehead mould |
| 6 | Finished pipe ends trimming machine |
| 7 | pipe Conveyers and racks |
| 8 | Electrical system and PLC |
Features of the polyurethane spraying PE winding insulation pipe
(1). Density, thermal conductivity, compressive strength and
other indices of the polyurethane insulation layer are uniform and
consistent.
(2). The polyurethane insulation layer is formed by free foaming.
Since polyurethane is foamed perpendicular to the axial
direction of the pipe, compressive strength of the insulation layer
is improved.
(3). The polyurethane insulation layer is formed after spraying.
The raw materials are sprayed onto the outer surface of the
steel pipe in a liquid form, and then begins to foam. Due to the
high reaction activity of the spraying polyurethane raw materials,
adhesion between steel pipe surface and polyurethane foam layer is
stronger.
(4).Roughness of the surface of polyurethane foam layer is more
conducive to increase bonding effect between insulation layer and
outer HDPE protective layer.
(5). Polyurethane insulation layer can be sprayed according to the
thickness required by customers with a thickness of 15-20mm. Costs
can be significantly saved.
(6). Prefabricated directly buried insulation pipes produced using
the "spray winding" process, with polyurethane insulation layer and
polyethylene outer protective layer thickness adjustable according
to users needs. The production process does not require additional
molds and tooling, making it simple and easy to operate. Due to the
absence of expansion stress on the polyethylene outer protective
layer during foaming in the "spray winding" process, thickness of
the polyethylene outer protective layer can be relatively thinner,
reducing costs for customers.
(7). The polyethylene outer protective layer is formed by
circumferential winding, therefore circumferential elongation and
tensile strength are significantly improved. Circumferential
strength of polyethylene protective layer is stronger.
(8). As this is a completely automatic production line, Production
speed is improved and production quality is consistent and
superior.
Company Profile
Qingdao Huashida Machinery Co., Ltd. was established in 2003 and is
a manufacturer specializing in thermal insulation and
anti-corrosion equipment.We offer one-stop pipeline solutions.Focus
on the global international market.The insulation pipe production
lines and 3lpe Anti-Corrosion Coating line developed and
manufactured by Huashida are widely used in the construction of
municipal heating, sewage, water supply, natural gas and
communication pipe networks, crude oil pipeline transportation,
communication and agricultural irrigation and other fields.
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