ASIG’s tunnel segment gaskets are being used successfully in subway tunnels and water transferring systems. TSGs meet international standards of ASTM and STUVA procedures in which some standards are according to the requirements of ISO/IEC-17025.
Gaskets profiles have been verified both in in-house laboratories and Razi Metallurgical Research Center (RMRC)1. The following tests have been done on the gaskets:
|
|
Test |
Standard / Procedure |
|
1 |
Tension (Tensile) |
ASTM D 412-06a (ISO/IEC-17025) |
|
2 |
Hardness |
ASTM D 2240 - 05 (ISO/IEC-17025) |
|
3 |
International Hardness |
ASTM D 1415 |
|
4 |
Compression Set |
ASTM D 395-03 |
|
5 |
Deterioration in an Air Oven (aging) |
ASTM D 573 |
|
6 |
Effect of Liquids (Swelling in Oil & Water) |
ASTM D 471-06 |
|
7 |
Water Absorption of Plastics |
ASTM D 570-98 (2005) |
|
8 |
Water Absorption of Cellular Elastomeric Gaskets and Sealing Materials |
ASTM C1083 |
|
9 |
Cracking in an Ozone Controlled Environment |
ASTM D1149-D1171 |
|
10 |
Flame Propagation of Dense and Cellular Elastomeric Gaskets and Accessories |
ASTM C1166 |
|
11 |
Load Deflection |
STUVA Procedure (2005) |
|
12 |
Water Tightness |
STUVA Procedure |
ASTM: ASTM International is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.
S TUVA: STUVA is an independent, non-profit research institution in Germany with the fields of activities include fundamental research and special analyses, focusing mainly on the areas of underground construction and railway and road transport.
1. RMRC is accredited according to ISO/IEC 17025 by National Accreditation Center of Iran (NACI)