Detailed explanation of TIS 216-2524 standard in Thailand (Fittings for PVC-U pressure pipelines)
Categories:News Author: author
1. Overview of Standards
TIS 216-2524 (released in 1981) is a technical specification for PVC-U (Unplasticized Polyvinyl Chloride) pressure piping fittings developed by the Thai Industrial Standards Institute (TISI), applicable to PVC-U fittings for socket or adhesive connections in water supply, irrigation, and other pressure fluid delivery systems.
This standard specifies the material requirements, dimensional tolerances, physical properties, testing methods, and markings for PVC-U fittings, ensuring the safety and durability of the product under pressure conditions.
2. Scope of application
Applicable products: ULPIPES pipe and fittings for PVC-U pressure piping systems (such as elbows, tees, reducers, flanges, etc.).
Suitable for socket or solvent cement connection methods.
Applicable system:
Water supply pipeline (compliant with TIS 17 standard).
Agricultural irrigation system.
Industrial low-pressure fluid transportation.
3. Main technical requirements
(1) Material requirements
Raw materials: PVC-U materials that comply with TIS 17-2531 or TIS 17-2560 must be used.
Additives: Stabilizers, lubricants, pigments, etc. are allowed to be added, but they must not affect the mechanical properties and hygiene safety of the pipe fittings.
Hygiene requirements (such as for drinking water):
Meets the safety standards of the Thai Ministry of Health for materials in contact with drinking water.
It shall not contain excessive harmful heavy metals such as lead and cadmium.
(2) Dimensions and tolerances
Socket size: It must match the matching PVC-U pipe (such as TIS 17 standard pipe) to ensure sealing.
Wall thickness of pipe fittings: The minimum wall thickness requirement must be met to ensure the pressure bearing capacity.
Angle tolerance (such as elbows, tees): The standard angle deviation of 45 °, 90 °, etc. shall not exceed ± 1 °.
(3) Physical and mechanical properties
Testing project requires testing methods
Hydraulic test under specified pressure (such as PN10, PN16) at 20 ° C without leakage or rupture TIS 17/ISO 4422
Vicat softening temperature ≥ 80 ° C ISO 306
Drop hammer impact test without rupture (at -10 ° C or specified low temperature conditions) TIS 197/ISO 3127
Tensile strength ≥ 40 MPa ISO 6259
(4) Chemical resistance
The pipe fittings should be able to withstand common water quality (pH 6.5-8.5) and weak acid and weak alkali environments without significant corrosion or deformation.
4. Marking and Certification Requirements
(1) Product logo
The following information should be clearly marked on ULP each pipe fitting:
TIS 216-2524 standard number
Manufacturer's name or trademark
Size specifications (such as DN20, DN25)
Pressure level (such as PN10, PN16)
Production batch number or date
(2) ULP TIS certification process
1. Product testing: Conduct hydraulic, impact, Vicat softening and other tests in TISI accredited laboratories.
2. Factory audit: Check the production quality control system (such as raw materials, processes, and testing equipment).
3. Certification application: Submit test reports and factory audit documents to TISI.
4. Certification&Supervision: Upon approval, obtain the right to use the TIS logo and undergo annual supervision and review.
5. Comparison with other standards
5.The difference between the scope of application of the standard and TIS 216-2524
| Standard | Scope of application | Differences from TIS 216-2524 |
| TIS 17-2560 | PVC-U pressure pipeline | Pipe standard, used in conjunction with TIS 216 fittings |
| ISO 4422 | International PVC-U Pipeline Standard | Some testing methods are similar, but TIS 216 adds localization requirements for Thailand |
| ASTM D2466 | American standard PVC pipe fittings | Different size series result in differences in the expression of pressure levels |
6. ULPIPES Market application and precautions
(1) Main applications
Building water supply system (used in conjunction with TIS 17 pipeline).
Agricultural irrigation engineering (weather resistant PVC-U pipe fittings).
Industrial low-pressure fluid transportation (non corrosive media).
(2) Selection and Construction Suggestions
Ensure that the fittings match the pipeline standards (such as TIS 17 pipes with TIS 216 fittings).
Use TIS certified PVC adhesive for adhesive connection to avoid leakage.
Avoid direct sunlight or high temperature environments to prevent material aging.
7. Conclusion
ULPIPES TIS 216-2524 is the core standard for PVC-U pressure pipeline fittings in Thailand, ensuring the reliability and safety of products in fields such as water supply and irrigation. Manufacturers and importers must strictly comply with this standard and obtain TIS certification to meet the market access requirements in Thailand.