Lagged Pipe Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-HTL-10042
Jlab Export is a leading Lagged Pipe Apparatus Manufacturer,and suppliers in India
Lagged Pipe Apparatus (code EL-HTL-10042) is a conduction rig of three concentric G.I. pipes, 1 m long, with one lagging material filling the gap between the inner and middle pipes and a second lagging in the outer gap. A central cartridge heater drives heat outwards, and thermocouples on the pipe surfaces give the temperatures for finding the conductivity of each lagging. JLab builds the pipe assembly, stand and meter panel in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Pipes | Three concentric G.I. pipes, 1 m long, on a stand |
| Innermost pipe | 6 cm outer diameter |
| Middle pipe | 8.5 cm mean diameter |
| Outermost pipe | 10.7 cm inner diameter |
| Lagging | One material between the inner and middle pipes, a second between the middle and outer pipes |
| Heater | Nichrome wire cartridge heater placed centrally along the pipe |
| Control panel | Single phase dimmerstat; voltmeter 0–250 V; ammeter 0–2 A |
| Temperature measurement | Multichannel digital indicator, 0–300 °C, with Cr-Al thermocouples on the pipe surfaces |
| Electricity | Single phase 230 V AC |
| Floor area | 1.5 m x 1 m x 0.5 m high |
| Quality check | Each lagged pipe apparatus is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Product code | EL-HTL-10042 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Two Laggings in Series
At steady state the heater output, Q = VI, crosses both laggings in turn. A cylindrical layer between radii ra and rb over a length L has a resistance of ln(rb/ra)/(2πkL), so the inner lagging gives k1 = Q ln(r2/r1)/[2πL(T1 − T2)] and the outer one k2 = Q ln(r3/r2)/[2πL(T2 − T3)]. Here r1 comes from the 6 cm innermost pipe, r2 from the 8.5 cm middle pipe and r3 from the 10.7 cm bore of the outer pipe. The thin G.I. walls add almost no resistance, which is why the middle pipe is given by its mean diameter: its one surface temperature, T2, serves both laggings.
What the Temperature Profile Shows
Each layer takes a share of the overall fall from T1 to T3 in proportion to its resistance, ln(rb/ra)/(2πkL), so the drop across a layer grows as its conductivity falls or its radius ratio rises. Runs at two or three dimmerstat settings show whether k changes with mean temperature, as it often does for insulating materials, and the same readings give a combined conductivity for both laggings treated as one layer between r1 and r3.
Other Radial and Flat-Wall Conduction Rigs
- Heat Transfer Through Lagged Pipe — lagged G.I. pipe of 5 kW capacity for radial conduction tests.
- Composite Walls Apparatus — flat MS, Bakelite and brass or aluminium plates in series around a mica heater.
- Thermal Conductivity of Insulating Powder — the spherical case, with powder between two concentric copper spheres.
Find it with the other Heat Transfer Lab rigs in Engineering Lab Equipment.
Request a Quote
Send the quantity and the delivery town through the contact page, or add the apparatus to an enquiry with Add To Cart, and JLab will reply with a quotation.
Last updated: 30 October 2026
