The Finetech Engineering hot water bath manufacturer India is a temperature-controlled laboratory water bath designed for heating and maintaining liquid at a precise temperature for extended periods. Its primary application is the hot water bath plastic pipe reversion test India – mandatory for HDPE, PVC, and PPR pipes per IS 12235 and IS 4984, and a BIS requirement for every plastic pipe manufacturer in India.
Understanding “what is pipe reversion test plastic IS 4984” and “what is longitudinal reversion test plastic pipe”: a marked length of plastic pipe is immersed in hot water or oil at a specified temperature for a set time. The pipe relaxes internal stresses from the extrusion process and shrinks in length. Excessive shrinkage indicates improper manufacturing conditions – wrong die temperature, too-fast haul-off speed, or inadequate cooling – and the pipe may not perform reliably in the field.
As a versatile plastic pipe shrinkage test equipment India and laboratory water bath PID control India, the Finetech hot water bath also serves as a general-purpose heating and conditioning tool: immersion resistance testing of coatings and adhesives, wax melting for embedding specimens, temperature conditioning of samples before testing, and any test that requires a water medium rather than dry air.
Tip: For Indian plastic pipe manufacturers, the hot water bath is mandatory equipment. As your trusted BIS pipe testing equipment manufacturer India, Finetech builds units that meet the IS 12235 PVC pipe reversion test water bath India requirements and IS 4984 HDPE requirements – and this test can only be done in a temperature-controlled water or oil bath.
Test | Standard | Temperature | Duration | Industry |
Longitudinal reversion (shrinkage) – HDPE pipes | IS 4984, ISO 2505, ASTM D2122 | 110°C (oil bath) or boiling water | 60 min (for ≤8 mm wall) to 240 min (for >16 mm) | HDPE pipe manufacturing |
Longitudinal reversion – PVC pipes | IS 12235, ISO 2506 | 150°C (oil bath) or per standard | 15–60 min | PVC pipe manufacturing |
Longitudinal reversion – PPR pipes | IS 15609, ISO 15874 | Per standard | Per standard | PPR pipe manufacturing |
Immersion resistance testing | Various (ASTM D543, IS standards) | Per specified temperature | Per specified duration | Coatings, adhesives, rubber |
Wax embedding / mounting | General lab use | 60–80°C | As needed | Metallography, microscopy |
Specimen conditioning / thawing | General lab use | Various | As needed | General QC, pharma |
Water absorption testing | ASTM D570, ISO 62 | 23°C or boiling (100°C) | 24 h or 2 h (boiling) | Plastics |
Note: For reversion testing at temperatures above 100°C (e.g., 110°C or 150°C for certain pipe standards), an oil bath or a glycol bath is required instead of water. The Finetech bath can be used with silicone oil or glycol-based heat transfer fluids for these applications. Confirm the heat transfer medium required by your standard before ordering.
Parameter | Specification |
Product Name | Hot Water Bath (Temperature-Controlled Laboratory Water Bath) |
Temperature Range | Ambient +5°C to 100°C (water); up to 200°C with silicone oil |
Temperature Control | PID microprocessor controller with digital display |
Temperature Accuracy | ±0.5°C at setpoint |
Temperature Uniformity | ±1°C across the bath |
Tank Material | Stainless Steel 304 (SS 304) – seamless welded construction |
Tank Capacity | 12 L, 20 L, 30 L, 50 L (larger sizes available on request) |
Heating | Immersion heaters (tubular, stainless steel) |
Lid System | Concentric ring lid (stainless steel) – accommodates pipes and specimens of various diameters |
Timer | Digital timer with alarm and auto-shutoff |
Over-Temperature Protection | Separate safety thermostat cuts power if bath exceeds safe limit |
Drain | Bottom drain valve for easy emptying and cleaning |
Power Supply | 230V AC, single phase, 50 Hz |
Standards Supported | IS 12235, IS 4984, IS 15609, ISO 2505, ISO 2506, ASTM D2122, ASTM D570 |
Certification | ISO 9001:2015 certified manufacturing |
Tank Capacity | Best For |
12 L | Small specimens, conditioning, wax melting, general lab use |
20 L | Standard pipe testing – handles 200 mm pipe lengths for most reversion tests |
30 L | Larger pipes, multiple specimens simultaneously, batch testing |
50 L+ | Large-diameter pipes, high-volume QC, extended immersion tests |
Tip: For pipe reversion testing, the bath must be large enough to fully immerse the pipe length specified by the standard (typically 200 mm). A 20 L bath handles most common pipe sizes. For large-diameter HDPE pipes (above 110 mm OD), a 30–50 L bath may be needed.
Designed for Indian pipe testing standards – your trusted IS 4984 HDPE pipe shrinkage test water bath solution. Built specifically to meet IS 12235, IS 4984, and IS 15609 requirements. The concentric ring lid, bath dimensions, and temperature range are optimised for the pipe reversion tests that every Indian pipe manufacturer must perform.
SS 304 stainless steel tank. The tank operates with water at temperatures up to 100°C for thousands of hours. Carbon steel corrodes and contaminates the water within months. SS 304 stays clean and corrosion-free for years.
PID control with ±0.5°C accuracy – the best laboratory water bath PID control India performance. Reversion test results are sensitive to bath temperature. Even a 2–3°C deviation from the specified temperature can shift shrinkage values. The PID controller maintains tight accuracy throughout the test.
Concentric ring lid. The stainless steel lid with removable concentric rings accommodates pipes of different diameters while minimising heat loss and water evaporation. No custom lid needed for each pipe size.
Calibration and AMC support – best hot water bath price India laboratory value with traceable certificates and annual maintenance. Temperature calibration with traceable certificates, plus AMC for heater inspection, thermostat verification, and tank maintenance.
Product | Why Related |
For conditioning specimens at 23°C/50% RH before mechanical testing | |
Complementary incoming QC for pipe raw materials | |
Complementary thermal property testing of plastics | |
Complementary tensile/flexural testing of pipe materials | |
For ash content testing of plastic compounds |
Customisation available
The primary use is what is pipe reversion test plastic IS 4984: longitudinal reversion (shrinkage) testing of plastic pipes per IS 12235 (PVC), IS 4984 (HDPE), and IS 15609 (PPR). A marked pipe section is immersed in hot water or oil at a specified temperature for a set time, and the length change is measured. It is also used for water absorption testing, immersion resistance, and general specimen conditioning.
Answering “what is longitudinal reversion test plastic pipe”: when plastic pipe is extruded, internal stresses are frozen into the material during cooling. When the pipe is heated, these stresses relax and the pipe shrinks in length. The reversion test measures this shrinkage as a percentage of the original length. IS 4984 specifies a maximum allowable reversion of 3% for HDPE pipes.
It depends on the test temperature. For the IS 4984 HDPE pipe shrinkage test water bath: temperatures up to 100°C use water; for above 100°C (e.g., 110°C for HDPE per some standards or 150°C for PVC), silicone oil or glycol is required because water boils at 100°C. The Finetech bath works with both – specify your standard when ordering.
The pipe specimen must be fully immersed. For IS 4984 HDPE pipe testing, the standard specimen length is 200 mm. A 20 L bath comfortably handles pipes up to 110 mm outer diameter. For larger pipes, choose 30–50 L. Tell us your pipe diameter range and we will recommend the right size.
IS 4984 and IS 12235 require the bath temperature to be maintained within ±2°C of the specified temperature. The Finetech PID controller achieves ±0.5°C, well within the standard’s requirement.
Yes. As a certified BIS pipe testing equipment manufacturer India, Finetech hot water bath meets the temperature control requirements of IS 12235 and IS 4984. We provide temperature calibration certificates that support NABL accreditation for pipe reversion testing.
