... ,K12 ISO2531, Ductile cast iron single flange pipe fitting Lined cement and rich zinc & Bitumen ISO9001 certificat Single flange ductile iron ... -2000mm,PN10/16/25 ,K12Certificates : ISO9001, ISO2531, EN545 ect.Coating : cement lining and -rich zinc plus Bitumen.Flange drilled as per BS4504 ...