Ürün Standartları için bakabileceğiniz web adresleri:

TÜRK STANDATLARI ENSTİTÜSÜ
www.tse.org.tr

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
www.iso.ch

BRITISH STANDARDS INSTITUTION
www.bsi-global.com

DIN DEUTSCHES INSTITUT FUR NORMUNG e.V.
www2.din.de

AMERICAN NATIONAL STANDARDS INSTITUTE
www.ansi.org

AMERICAN SOCIETY OF MECHANICAL ENGINEERS
www.asme.org

AMERICAN PETROLEUM INSTITUTE
www.api.org

AMERICAN SOCIETY FOR TESTING AND MATERIALS
www.astm.org

Valflerle ilgili Yayın web adresleri:

Valve World
http://www.valve-world.net/index.asp