Name: Casing Then Foam Insulation Line DN90-315 mm
Brand: Qingdao Huashida Machinery Co., Ltd.
SKU: DN90-315 mm
Price: 1507500.00 USD
Availability: InStock

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Features

Specifications

Pipe Material: Steel/HDPE

Pipe Uasge: Pre-insualte

Speed: 2.0m-3m/Min

Product Type: Pipe Production Line

Extrusion Process: Multi-Layer Extrusion

Material: HDPE LDPE

Pipe Dia: 90-315mm

Weight: 27Tons

Highlight:

Pre-Insulated Pipe Production Line DN90-315

Casing Then Foam Insulation Line

Pre-Insulated Pipe Casing Foam Line

Basic Infomation

Place of Origin: China

Brand Name: Huashida

Certification: CE, Rohs，TUV

Model Number: DN90-315 mm

Payment & Shipping Terms

Delivery Time: 60-120days

Payment Terms: T/T

Supply Ability: 200 set/year

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Casing Then Foam Insulation Line DN90-315 mm

Product Description

Casing Then Foam Insulation Line DN90-315 mm

Overview

Secondary network pipe is not made in campaigns of one size. A plant supplying a city district or a housing scheme runs 32, 50, 75, 110 and 160 mm in the same week, often in batches of twenty pipes. A one-shot line is chosen here because casing extrusion, pipe insertion and foaming sit on one frame: the casing is cut to length and immediately married to the steel pipe, so there is no casing store, no double handling and no second crane. The buyer is usually a compact workshop of 600 to 1,200 m2 feeding a municipal utility or a developer, and the decision is made on payback against bought-in pipe rather than on maximum output.

Process Flow

Casing is extruded, calibrated and cut on the same frame, then transferred sideways by a short roller table to the insertion station. The steel pipe is pushed in against a guide sleeve, both ends are plugged, and one head injects foam. The filled pipe goes to a rack for a day and then to trimming, chamfering and a holiday test.

Key Configuration

One 90 mm single screw extruder feeds a spiral mandrel die and a vacuum calibration sleeve, and the cut casing is transferred sideways to the insertion station by a short roller table, so the line fits a 12 m bay. On the DN75-250 mm line the calibration sleeve is cut with a shrinkage allowance for the compound, and vacuum is held at a level that keeps the tube against the bore until the wall is rigid. The foaming station is a single high pressure head sized at 40 kg/min, which matches a 20 to 40 pipe day without holding a large shot in the mixing chamber where it would start to react.

Applications

Secondary heating networks inside a city block; service connections from a main to a building; housing estate distribution; small diameter hot water pipe for public buildings; replacement lengths for old directly buried steel service pipe. These are short runs welded on site, so the cutback and the end seal matter as much as the insulation value.

Standards

Typically GB/T 29047 for domestic work, EN 253 where the utility follows European practice. Both require a bonded system with closed cell content at 88 percent or above, and both are checked by a shear test on a sample cut from production. Which standard governs the DN75-250 mm line is decided before the order is released, as EN 253, GOST 30732 and GB/T 29047 lead to different acceptance tests.

Service & Support

Installation of the DN75-250 mm line is supervised for 15 to 25 days, and the schedule is anchored to the first pipe you intend to sell. On the DN75-250 mm line the training priority is calibration and wall first, foam density and adhesion second, because that is the order failures appear in.

Why Huashida

We build insulation lines and we also run pipe coating operations of our own, so the argument about whether a casing fits is one we have had internally rather than one we have only heard from customers. The company was founded in 2003, holds ISO 9001 and ISO 14001, and its equipment runs in more than 40 countries.

Item	Specification
Model / Type	Vacuum sizing and pipe-in-pipe foaming pre-insulated pipe production line, complete line
Pipe Diameter Range	DN90-315 mm
Process	Casing extrusion, polyurethane foaming, end finishing and testing in one continuous flow
Insulation Layer	Rigid polyurethane foam, density 60 to 80 kg/m³, closed cell content 88% or above
Thermal Conductivity	0.033 W/m·K or lower at 50 °C mean temperature
Service Temperature	up to 120 °C continuous, 140 °C peak
Line Output	180 m² of insulated surface per hour at nominal wall
Annual Capacity	sized against the buyer's kilometre target, not a catalogue figure
Casing Extruder	single screw 90 mm, 33:1 L/D
Extruder Output	300 kg/h of HDPE compound
Casing Wall Thickness	2.5 to 4.0 mm, set by diameter and burial load
Vacuum Calibration	stainless calibration sleeve, vacuum held at -0.03 to -0.05 MPa, water ring pump
Cooling	6 m vacuum tank plus spray cooling, water recirculated
Haul Off Speed	2.0 to 3.5 m/min, set by casing wall and diameter
Foam Injection	high pressure machine, 40 kg/min, impingement mixing at 150 to 200 bar
Centring	steel pipe centred inside the casing before injection, spacer set per diameter
Curing	rack curing 24 hours minimum before end finishing
Control System	Well-known brand PLC and HMI, recipe per diameter, batch record per shift
Operators per Shift	4 to 6
Installed Power	calculated per configuration, typically 380 to 620 kW
Workshop Requirement	layout drawing issued with the quotation
Commissioning	site supervision by 2 engineers, 15 to 25 days
Documentation	English layout, foundation, electrical, PID and operation manuals
Warranty	12 months machine, 24 months drive train
Certification	ISO 9001 quality system; CE option for EU delivery

Technical Prameters:

	PE-365/760	PE-420/960	PE-850/1372	PE-960/1680
Main extruder	SJ-90/33	SJ-90/33	SJ-120/33	SJ-150/33
Pipe diameter (mm)	Φ365-960	Φ420-960	Φ850-1372	Φ960-1680
capacity (kg/h)	550-700	550-700	700-900	800-1200
Installed power (kw)	360	380	440	580
Length (m)	35	36	40	48

Casing Then Foam Insulation Line DN90-315 mm

HDPE Jacket Process Flow:

Vacuum Feeding of PE Granules: The raw PE granules are automatically fed into the system via vacuum suction.
Hot Air Drying: The granules are dried using hot air to remove moisture, ensuring optimal extrusion quality.
Extrusion Plasticizing: The dried granules are plasticized through the extruder, heated and mixed to form a molten plastic mass.
Mold Shaping: The molten plastic is shaped into the desired pipe profile by passing through the extrusion die.
Vacuum Sizing: The pipe is then subjected to vacuum sizing, adjusting its dimensions to precise specifications.
Water Cooling: The pipe is cooled rapidly by immersion in a water tank to solidify its shape and structure.
Pulling Out: The solidified pipe is pulled out of the cooling tank at a controlled speed.
Cutting: The pipe is cut to the desired length using a precision cutting machine.
Carrier Laying-off: The cut pipes are then neatly laid off onto a carrier for further handling or packaging

Composition of Equipments:

Hopper Dryer
Single Screw Extruder
Extrusion Mould Die
Head Bracket
Vacuum Calibration Device
Water Cooling Tank
Haul-off Unit
Planetary Cutting Machine
Pipe Bracket
Loader
PLC (Programmable Logic Controller)

Casing Then Foam Insulation Line DN90-315 mm

The production steps of the insulation layer for a pre-insulated pipe, specifically focusing on the polyurethane (PU) foam insulation, are outlined below in detail:

Formation of the Casing Structure:
- The steel pipe is first inserted into the high-density polyethylene (HDPE) outer protection pipe, creating a casing structure.
- Supports are evenly arranged in the annular space between the steel pipe and the HDPE outer pipe to maintain a uniform distance and prevent the two pipes from touching directly.
- The two ends of the casing are sealed with flanges to ensure that the polyurethane foaming material will be contained within the space during the injection process.
Preparation of the Steel Pipe Surface:
- Prior to the injection of the insulation material, the surface of the steel pipe undergoes pre-treatment such as shot blasting or blast cleaning. This step removes any impurities, rust, or scale, providing a clean and suitable surface for optimal adhesion of the polyurethane insulation.
- Additionally, corona treatment of the polyethylene pipe shell's surface may also be performed to enhance its adhesion properties.
Injection of Polyurethane Foaming Material:
- The casing structure is hoisted onto a foaming platform specifically designed for this purpose.
- A high-pressure foaming machine is used to inject the polyurethane foaming material into the casing. The material expands and fills the entire annular space between the steel pipe and the HDPE outer pipe.

Casing Then Foam Insulation Line DN90-315 mm

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Contact Person :	Ms. yuki
Tel :	+8615953227920
Fax :	86-532-57780399

Casing Then Foam Insulation Line DN90-315 mm

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