WATER & WASTEWATER INFRASTRUCTURE TEST CHAMBERS
Auto Technology designs and manufactures environmental test chambers for protective coatings, linings and materials used in drinking water and wastewater infrastructure. ATC systems can automate freezing, heating, water immersion, condensing humidity, water fog and severe wastewater exposures used to evaluate materials for pipe, tanks, treatment equipment, sewer structures and other infrastructure.
ASTM G210 Severe Wastewater Chambers
Purpose-built equipment for repeated liquid immersion and simulated sewer-headspace exposure with automated specimen movement, temperature control, gas delivery, purge, exhaust and test sequencing.
X Series Environmental Cycling
Configurable for freezing, elevated temperature, condensing humidity, water fog and automated immersion for multi-stage environmental tests.
Testing Coatings and Linings for Water Infrastructure
Drinking water and wastewater systems depend on steel, concrete and other structural materials that may remain in service for decades. Pipe, tanks, fittings, manholes, wet wells, treatment structures and process equipment are frequently protected by coatings and linings intended to resist continuous moisture, immersion, condensation, temperature changes and chemically aggressive environments.
The scale of the infrastructure requiring maintenance and replacement is substantial. The U.S. EPA Drinking Water Infrastructure Needs Survey estimates approximately $625 billion in drinking-water infrastructure needs over 20 years. EPA's Clean Watersheds Needs Survey identifies approximately $630 billion in clean-water infrastructure needs.
These figures represent total infrastructure needs, not corrosion damage alone.
They illustrate the scale of the pipe, treatment, conveyance and storage infrastructure that must be maintained. Laboratory qualification helps determine whether protective materials can withstand the environments specified for those assets.
Drinking Water Systems
Steel water pipe and fittings.
Interior and exterior pipe coatings.
Storage tanks and treatment equipment.
Continuous water immersion and moisture exposure.
Protective coating programs including AWWA C210 and AWWA C222.
Wastewater Systems
Sewer pipe and protective linings.
Manholes, wet wells and lift stations.
Treatment structures and process equipment.
Immersion, condensation and temperature exposure.
Severe wastewater and sewer-headspace testing under ASTM G210.
Environmental Test Standards Used for Water & Wastewater Materials
Infrastructure coating programs use several different types of environmental exposure. The equipment requirement depends on whether the test calls for freezing, immersion, condensation, water fog, elevated temperature or a simulated wastewater environment.
| Standard | Primary Exposure | Key Conditions | Auto Technology Equipment |
|---|---|---|---|
| ASTM G210 | Severe wastewater liquid and sewer-headspace exposure | Elevated temperature with repeated liquid immersion, simulated sewer gas and purge periods | Dedicated ASTM G210 chamber |
| ASTM D6944 Method A | Heat, water immersion and freezing | 50 ± 3 °C air, 25 ± 3 °C water immersion and -29 ± 3 °C air | X Series with mechanical cooling and immersion |
| ASTM D6944 Method B | Heat and freezing | 50 ± 3 °C air and -29 ± 3 °C air | X Series with mechanical cooling |
| ASTM D2247 | Condensing humidity | 100% RH saturated environment, normally around 38 °C | X, A, C or M Series |
| ASTM D1735 | Water fog | Continuous controlled water-fog exposure | X, A, C or M Series |
| ASTM D870 | Water immersion | Controlled water temperature; 38 ± 2 °C when another temperature is not specified | X Series with immersion or dedicated immersion chamber |
| ASTM D2243 | Freeze/thaw stability of water-borne coating material | 17 hours near -18 °C followed by 7 hours at room temperature | X Series or dedicated thermal chamber |
Use the exact revision cited by the project. Temperatures, tolerances, exposure duration, specimen handling and other requirements can change between revisions or be modified by the governing coating or project specification.
X Series for ASTM D6944, D870, D2247, D1735 & Freeze/Thaw Testing
The Auto Technology X Series is the primary ATC platform when a water-infrastructure test requires several environmental conditions in one programmable system. Depending on configuration, the X Series can provide freezing, heating, water fog, condensing humidity and automated immersion.
Freezing & Heating
Mechanical cooling and chamber heating support sub-zero and elevated-temperature stages used in ASTM D6944 and other thermal-cycling programs.
Automated Immersion
Configurable immersion hardware can move specimens into and out of water or control an immersion stage without requiring repeated manual transfers between separate environmental chambers.
Water Fog & Condensation
The same platform can provide ASTM D1735 water fog, ASTM D2247 condensing humidity and other programmed moisture exposures.
ASTM D6944 Automated Thermal Cycling
ASTM D6944 evaluates the ability of cured coatings to withstand repeated thermal stress. Method A is particularly suited to an automated chamber because it combines three different environments in each cycle: heated air, water immersion and freezing.
ASTM D6944 specifically identifies a chamber containing heating, refrigeration and immersion capability in one unit as an ideal equipment arrangement for Method A. Separate pieces of equipment are permitted, but they require the specimens to be transferred between each exposure.
| Method | Stage | Time | Nominal Condition |
|---|---|---|---|
| D6944 Method A | Heated air | 4 hours | 50 ± 3 °C |
| Water immersion | 4 hours | 25 ± 3 °C | |
| Freezing | 16 hours | -29 ± 3 °C | |
| D6944 Method B | Heated air | 8 hours | 50 ± 3 °C |
| Freezing | 16 hours | -29 ± 3 °C |
ASTM D6944 requires the chamber to achieve the specified thermal cycle with the intended test load installed.
Method A includes a -29 ± 3 °C freezing stage in addition to heated-air and immersion stages. Chamber size, specimen mass, airflow and cooling configuration therefore matter. ATC configures the system around the required cycle and intended load rather than assuming that every chamber configuration is suitable for the method.
ASTM D870 Controlled Water Immersion
ASTM D870 evaluates coatings by partial or complete immersion in controlled water. When no other temperature is specified, the method uses water maintained at 38 ± 2 °C. An X Series chamber with immersion capability can automate the exposure when immersion is part of a larger environmental cycle.
For continuous immersion programs that do not require freezing, humidity, fog or other chamber conditions, an Auto Technology continuous immersion chamber may be the simpler equipment choice.
ASTM D2243 Freeze/Thaw Stability
ASTM D2243 is different from the cured-coating tests above. It evaluates water-borne coating material in containers before application. The test specimen is held near -18 °C for 17 hours and then allowed to stand for 7 hours at room temperature.
The X Series can provide the freezing portion of the method. The complete test arrangement must also account for the specified room-temperature thaw period, container handling and the post-cycle evaluations required by the method.
ASTM D2247 Condensing Humidity & ASTM D1735 Water Fog
Many protective-coating programs do not require freezing or automated immersion. Where the specified exposure is condensing humidity or water fog, Auto Technology can use the X Series, A Series, C Series or M Series depending on the required chamber size, controls and additional test capability.
X Series
Relevant standards: ASTM D2247 and ASTM D1735.
Best suited when condensation or water fog is one stage of a broader program that may also require temperature cycling, freezing or immersion.
A Series
Relevant standards: ASTM D2247 and ASTM D1735.
Provides elevated-temperature exposure, condensing humidity and water fog without the refrigeration and immersion functions of an X Series configured for more complex environmental cycling.
ASTM D2247 Condensing Humidity
ASTM D2247 exposes coated specimens in an atmosphere maintained at 100% relative humidity so that condensation forms on the specimen surfaces. The method normally operates around 38 °C and relies on a small temperature difference between the saturated environment and the specimen to produce condensation.
This is not an intermediate relative-humidity exposure. The required condition is a warm, saturated, condensing environment. X Series, A Series, C Series and M Series chambers can be configured to provide this exposure.
ASTM D1735 Water Fog
ASTM D1735 evaluates water resistance using a water-fog apparatus. Moisture is introduced as atomized water rather than relying primarily on condensation forming from a saturated atmosphere.
X Series, A Series, C Series and M Series chambers can be configured for water-fog exposure using the water quality, temperature and operating conditions required by the applicable test.
Water fog and condensing humidity are different test mechanisms.
ASTM D1735 introduces atomized water into the exposure environment. ASTM D2247 creates condensation on the specimen in a saturated environment. ATC configures the chamber according to the method rather than treating the two exposures as interchangeable.
ASTM G210 Severe Wastewater Test Chambers
ASTM G210 is specifically intended to evaluate protective coatings and linings under an accelerated severe wastewater environment. The apparatus reproduces both the liquid portion of the exposure and the corrosive simulated sewer headspace above it.
ASTM G210 is sufficiently different from conventional corrosion, humidity and thermal cycling that Auto Technology treats it as a dedicated machine, not as an option added to an X, A, C or M Series chamber.
Liquid Exposure
Test specimens are lowered into the specified wastewater solution for controlled immersion periods.
Sewer Headspace
Specimens are raised above the liquid and exposed to the controlled simulated sewer-gas atmosphere required by the method.
Automated Cycling
Specimen movement, immersion periods, gas exposure, air purge and the multi-day sequence can be coordinated automatically.
Purpose-Built G210 Equipment
- Corrosion-resistant wastewater exposure vessel.
- Automated specimen carousel, lift or equivalent movement system.
- Liquid and vapor exposure positions.
- Controlled elevated-temperature exposure.
- Metered simulated sewer-gas delivery.
- Programmed fresh-air purge.
- Gas exhaust and scrubbing provisions.
- Hydrogen-sulfide monitoring and appropriate safety interlocks.
- Automated timing, sequencing and exposure records.
Auto Technology can manufacture a system around the ASTM G210 apparatus and sequence or engineer a project-specific version when specimen dimensions, quantity or research requirements call for a different exposure volume or loading arrangement.
ASTM G210 is a gas-handling and chemical-exposure system, not a pressure test chamber.
The design must safely control hydrogen sulfide and the other specified gases through metered delivery, purge, exhaust, scrubbing, monitoring and appropriate pressure-relief provisions. The objective is controlled environmental exposure without dangerous gas accumulation or unintended vessel pressurization.
AWWA C210 & C222 Protective Coating Qualification
AWWA C210 and AWWA C222 are important protective-coating and lining standards for steel water pipe and fittings. They are relevant to water-infrastructure materials testing, but they should not be treated as single environmental chamber procedures.
Their qualification programs combine several independent test methods performed with different pieces of laboratory equipment. Chemical immersion, cathodic disbondment, impact, abrasion, dielectric, adhesion and similar evaluations should not be represented as functions of an X, A, C or M Series environmental chamber.
AWWA C210
AWWA C210 covers liquid-epoxy coatings and linings for steel water pipe, special sections, connections and fittings.
Immersion exposures within a C210 qualification program are normally performed in dedicated tanks or containers. Other required coating-property tests use their own specified equipment.
AWWA C222
AWWA C222 covers polyurethane coatings and linings for steel water pipe and fittings and includes a series of independent prequalification and quality-control tests.
Its chemical-resistance procedure uses separate covered containers for the specified test liquids. These exposures are normally performed as dedicated immersion tests rather than as an X, A, C or M Series chamber cycle.
Tests Normally Performed With Separate Equipment
| Qualification Test | Typical Equipment | X / A / C / M Chamber? |
|---|---|---|
| Chemical immersion | Dedicated immersion tanks or covered test containers | No |
| Water absorption | Dedicated immersion setup | No |
| Cathodic disbondment | Dedicated cathodic-disbondment cells or tanks with electrical control | No |
| Impact resistance | Impact test apparatus | No |
| Abrasion resistance | Abrasion tester | No |
| Dielectric strength / electrical withstand | Electrical test equipment | No |
| Electrical continuity / holiday testing | Holiday detector | No |
| Hardness | Durometer or specified hardness instrument | No |
| Pull-off adhesion | ASTM D4541 pull-off adhesion tester | No |
| Flexibility | Specified bend or flexibility apparatus | No |
Pressure values in coating qualification standards do not necessarily describe chamber pressure.
For example, adhesion values expressed in psi and pull rates expressed in psi per second apply to the pull-off adhesion instrument. Dielectric requirements apply to electrical test equipment. Neither represents a pressure requirement for an Auto Technology environmental chamber.
Custom Chambers for Water & Wastewater Test Methods
Published ASTM methods are only part of infrastructure testing. Utilities, engineering firms, coating manufacturers and material suppliers may specify their own exposure sequence or modify an established method for a particular pipe, tank, lining, treatment structure or wastewater environment.
Auto Technology can manufacture chambers around those requirements rather than forcing the program into a standard catalog configuration.
Temperature
Elevated-temperature exposure, controlled cooling and sub-zero operation when required by the test method.
Water & Moisture
Water fog, condensing humidity, controlled immersion, cyclic immersion and programmed wet/dry transitions.
Special Environments
Purpose-built gas exposure, automated specimen movement, dedicated solution systems and other requirements that fall outside a standard production chamber.
What ATC Reviews Before Designing the Chamber
| Requirement | Design Consideration |
|---|---|
| Standard and revision | Required environmental stages, timing, tolerances and transitions. |
| Specimen dimensions and quantity | Usable chamber volume, racks, orientation, spacing and access. |
| Specimen mass | Heating and cooling load, transition performance and temperature uniformity. |
| Lowest required temperature | Mechanical refrigeration requirements and performance under the intended load. |
| Immersion stages | Fluid volume, temperature, filling, draining and specimen movement. |
| Humidity or water fog | Correct moisture-generation method for the cited test. |
| Chemistry | Materials compatibility and separation of incompatible fluids. |
| Gas exposure | Gas delivery, monitoring, purge, exhaust, scrubbing and safety controls. |
| Automation | Program sequencing, pumps, valves, specimen movement, alarms and data logging. |
Send ATC the Test Requirement
Provide the standard or project specification, specimen dimensions, test load and required environmental sequence. Auto Technology can determine whether an X Series, A Series, C Series or M Series chamber fits the application or whether the program is better served by a dedicated system such as an ASTM G210 chamber.
Water & Wastewater Test Chamber FAQ
Which Auto Technology chamber is best for water infrastructure testing?
Chamber selection depends on the environmental exposure. X Series systems can provide freezing, elevated temperature, condensing humidity, water fog and immersion. A Series chambers provide elevated temperature, condensing humidity and water fog. C Series and M Series chambers provide condensing humidity and water fog. ASTM G210 severe wastewater exposure requires a dedicated G210 system.
Can Auto Technology manufacture an ASTM G210 wastewater chamber?
Yes. Auto Technology can manufacture a purpose-built ASTM G210 system with liquid and vapor exposure zones, automated specimen movement, controlled temperature, simulated sewer-gas delivery, air purge, exhaust, scrubbing, gas monitoring and automated test sequencing.
Can an X Series chamber automate ASTM D6944?
Yes, when properly configured. ASTM D6944 Method A requires heated air, water immersion and a nominal -29 °C freezing stage. An X Series chamber configured with mechanical cooling and immersion can automate those stages. Final chamber selection is based on the required cycle, chamber size, specimen load and required temperature performance.
Which chambers can perform ASTM D2247?
Which chambers can perform ASTM D1735 water fog?
Does AWWA C210 or C222 run in an X Series chamber?
AWWA C210 and C222 are broader coating and lining standards containing several independent qualification tests. Chemical immersion and water absorption are normally performed in dedicated tanks or containers. Cathodic disbondment, impact, abrasion, dielectric, hardness, adhesion and flexibility testing use their own specified equipment. These should not be treated as one X Series environmental chamber cycle.
Are there high-pressure requirements in these water infrastructure chamber tests?
The environmental chamber methods discussed on this page are not high-pressure exposure tests. Values expressed in psi within coating standards may refer to independent tests such as pull-off adhesion rather than chamber pressure. ASTM G210 requires controlled gas delivery, purge, exhaust and appropriate safety provisions, but it is not a pressure-vessel exposure test.
Can Auto Technology automate a custom infrastructure test cycle?
Yes. Auto Technology can design chamber systems around specification-defined combinations of temperature, freezing, water fog, condensation, immersion, wet/dry transitions, gas exposure and programmed specimen movement. The final system is based on the exact environmental sequence and intended test load.