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Soren20061110
JINGCHENG
3917290000 3904610000 3917390000
JINGCHENG Crack Sealing Machine Hose is an electrically heated hose for all types of road maintenance and crack sealing equipment, heat resistant up to 230°C and built with a unique inner tube reinforcement technology that secures its service life. This page reads the four-size catalog chart row by row — bore, outer diameter, working and burst pressure and the 150 mm to 300 mm bend radius — and shows how to match a size to sealant output, wand handling and the hose rack on the machine.
On a crack sealing machine the heated hose links the melter kettle to the applicator wand. Operators drag it along the road surface, coil it back on the machine at the end of every run and expect it to deliver hot sealant without interruption. Most hose problems on these machines start with a size choice that does not suit the job:
Bore too small for the output — the pump works against a restriction and the operator waits for material at the wand.
Bore too large for the handling — a heavier, stiffer hose is harder to guide along narrow cracks and needs a wider coil on the machine.
Coil diameter smaller than the bend radius — the hose is forced into tight loops on the hose rack or reel, which stresses the heating layer and the fittings.
Temperature set without checking the rating — the hose is run hotter than its catalog limit.
JINGCHENG's crack sealing machine hose is an electrically heated hose for all types of road maintenance equipment and crack sealing equipment. It is heat resistant up to 230°C (higher temperature on request) and uses JINGCHENG's unique inner tube reinforcement technology to secure the service life of the hose. The catalog lists four sizes, and the sections below explain how to read them before you specify a hose.
Reinforced inner tube: the proprietary reinforcement is the feature the catalog singles out for this product; it is what secures the working life of the hose under daily heating, handling and pressure.
Uniformly braided heating elements: the heating layer is braided evenly around the inner tube to minimize the temperature difference along the inner wall, so the sealant is not overheated in one section and cooled in another.
High-efficiency insulation: insulation materials are chosen with the hose surface temperature in mind, holding heat in the line and keeping the jacket safer for the crew to handle.
Matched sensor: Type J or Type K thermocouple, Ni120, PT100 or PT1000, to suit the controller on the machine.
The crack sealing hose table starts at 1/2" — there are no small-bore rows, because the hose is meant to carry viscous hot-applied material.
Inner diameter and outer diameter. The four rows are 1/2" (15.9 mm OD), 5/8" (19 mm OD), 3/4" (22.6 mm OD) and 1" (29.5 mm OD), each ±0.2 mm on OD. The OD is the figure to use when you check hose clamps, guides and the hose rack.
Working pressure falls as the bore grows: 118 bar (1704 psi) at 1/2", 88 bar (1269 psi) at 5/8", 85 bar (1234 psi) at 3/4" and 75 bar (1088 psi) at 1".
Burst pressure is 470 bar (6815 psi), 350 bar (5075 psi), 340 bar (4930 psi) and 300 bar (4350 psi) on the same four rows.
Minimum bend radius is the column that matters most on the machine: 150 mm at 1/2", 180 mm at 5/8", 260 mm at 3/4" and 300 mm at 1". The coil on the hose rack or reel, and every loop the operator makes on the road, should stay at or above this radius.
Inner Diameter (inch) | Outer Diameter (mm ±0.2) | Working Pressure (bar) | Working Pressure (psi) | Burst Pressure (bar) | Burst Pressure (psi) | Min. Bend Radius (mm) |
|---|---|---|---|---|---|---|
1/2" | 15.9 | 118 | 1704 | 470 | 6815 | 150 |
5/8" | 19 | 88 | 1269 | 350 | 5075 | 180 |
3/4" | 22.6 | 85 | 1234 | 340 | 4930 | 260 |
1" | 29.5 | 75 | 1088 | 300 | 4350 | 300 |
Data source: JINGCHENG 2025 Electrically Heated Hose Catalog. Heat resistance up to 230°C; higher temperature on request. Confirm the rating at your operating temperature with our engineers when ordering.
Choose the bore from the sealant output and the wand. A 1/2" or 5/8" hose is lighter to guide along cracks; a 3/4" or 1" hose carries more material but needs a wider coil.
Check the storage geometry. Measure the hose rack, reel or hook on the machine; its radius should not be tighter than the bend radius of the size you choose.
Plan the length. Catalog lengths are 3 m, 4.5 m, 5 m, 6 m, 10 m or other. A longer hose lets the operator cover more pavement from one machine position, but adds weight and coil size.
Confirm the temperature. State the application temperature of the sealant you use and check it against the 230°C standard rating.
Every JINGCHENG electrically heated hose is built to the customer's specification. Catalog options cover supply voltage (380 Vac, 220 Vac, 110 Vac, 12 Vdc or other), the temperature sensor, length, inner diameter (Φ8, Φ12, Φ16, Φ19, Φ25 mm or other), hose working pressure (4 MPa, 10 MPa, 20 MPa, 35 MPa or other), rated power (110, 150, 170 or 200 W/m or other), US, British or metric threads at each end, and the pin layout at the controller end and the wand end.
A model code such as JCH-200-16-B-3X220-P2-8 reads as 200°C working temperature, Φ16 mm ID, inner-tube type B (TB, T or X are the other options), three-phase four-wire 220 V supply, PT100 two-wire sensor and 8 MPa working pressure.
Do not twist the hose sideways during installation or use; torsion can cause leakage, flow loss, hose damage or fire.
Avoid sharp bends, especially next to the fittings at the kettle end and the wand end.
Wire the hose according to its technical data and the pin table supplied with it, and let only trained operators handle it.
The permitted ambient range is -40°C to +55°C, with relative humidity not above 85%.
Send the machine model, sealant type and application temperature, the bore and length you need, the supply voltage, the sensor type and the thread standard at each end. JINGCHENG engineers will confirm a matching crack sealing machine hose specification and quotation.
