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Constant-temperature bath, constant-temperature water bath

Name: Constant-temperature bath, constant-temperature water bath
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

The constant‑temperature water tank is suitable for conducting long‑term hydrostatic pressure tests, instantaneous burst tests, and determining the time to failure of thermoplastic pipes under sustained constant pressure at various temperatures.

Category:

Pipe and Fitting Testing Equipment

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E-mail:

lbt@lbt.ltd

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+86-15102211717

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Constant-temperature bath, constant-temperature water bath

Description

Product Introduction:

Implementation Standard

1. GB/T 6111-2018 “Test Method for Internal Pressure Resistance of Thermoplastic Pipes for Liquid Transport”;

2. ISO 1167-1996 “Test method for resistance to internal pressure of thermoplastic pipes for fluid conveyance”;

3. GB/T 18252-2000 “Determination of the Long-Term Hydrostatic Strength of Thermoplastic Pipes by the Extrapolation Method for Plastic Pipe Systems”;

4. GB/T 15560-95 “Hydraulic Instantaneous Bursting and Pressure Resistance Test Methods for Plastic Pipes Used in Fluid Conveyance”;

5. ASTM D1598-2004 “Pipe, Plastic, Under Constant Internal Pressure, Time-to-Failure of (No S/SDocument)”;

6. ASTM D1599 “Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings”

Instrument Features

1. The insulation system features an integral, all‑enveloping inner liner; it employs two types of insulating materials, delivering excellent thermal performance and substantial long‑term energy savings. At a water temperature of 95°C, the outer casing remains close to ambient room temperature, significantly enhancing overall equipment safety while reducing power consumption by more than 70%.

2. The piping system employs a recirculating spray‑type design, with the entire pipeline constructed from 304 stainless steel.

3. External (or internal) heater with high heat exchange efficiency; maintenance, inspection, and servicing of the heater can be performed without shutting down the system, ensuring uninterrupted operation of the experiment.

4. The cabinet lid shall open pneumatically, and upon opening, it must accommodate the laboratory’s required workspace.

5. The lid opening angle (opening size) can be set to any position and locked, ensuring reliability, safety, and convenience.

6. The lid is sealed with a silicone rubber gasket, ensuring no gas leakage even at high temperatures.

7. The frame‑box base features a robust structure, high load‑bearing capacity, and excellent resistance to deformation.

8. Stainless steel inner liner, equipped with a stainless steel pump housing and base frame, offering high load-bearing capacity and excellent resistance to deformation.

9. The inner liner is made of 2 mm-thick stainless steel.

10. Insulation layers with a thickness of 85 mm or greater, coupled with measures to minimize thermal bridges (short circuits), ensure energy-efficient insulation.

11. The inner and outer tanks are made of 304 stainless steel.

12. German circulation pump, with a large water tank and a rated circulation capacity of 135 L/min, depending on the tank size.

13. The temperature control system is equipped with a branded leakage protection device to ensure personal safety in a timely manner.

14. The constant-temperature water tank can operate in automatic circulation mode or be connected to an external circulation system.

15. The water tank is equipped with a built-in heating control system, and the pressure inlet ports are customized by the user (e.g., 10 ports).

16. If a refrigeration system is selected (with temperatures adjustable down to 20°C from room temperature), it employs a high‑power industrial compressor refrigeration system.

17. The inner walls of the water tank are equipped with high-pressure ports, each fitted with a high-pressure, high-temperature hose. The high-pressure hose can operate at temperatures up to 95°C.

18. The water tank employs a spray‑type design: a circulation pump draws hot water from the bottom and sprays it downward, creating a continuous循环 that maintains a stable temperature throughout the tank.

19. The temperature control system employs a microprocessor and features an RS‑232 interface, enabling communication with a computer to transmit temperature data in real time and display it on the computer’s user interface.

20. The water tank cover employs a dual-cylinder assisted lifting mechanism, ensuring smooth, safe, and reliable operation.

21. The water tank heating system employs a rear-mounted vertical heating configuration, offering features such as safety and ease of maintenance.

Technical specifications:

Test pipe diameter	Customization
Number of test routes	Depends on the number of host channels.
Test temperature	Temperature control range with refrigeration system: 20°C–95°C
Temperature control accuracy	±1℃
Liner material	All-304 stainless steel, both inside and out
Inner liner dimensions	Customization
Heating power	9 kW (standard) (subject to the contract)
Open the water tank lid system	Water tanks with a diameter of 315 mm or greater are controlled by pneumatic cylinders.

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

Which materials can be measured by your Vicat softening point tester?

It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

Customer Reviews

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

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