Concord Plastic Industry LLC: Manufacturing PVC / uPVC pipes DRAIN, WASTE SOIL & VENTILATION: BS 5255, BS 4514, DIN 19531, AS/NZS 1260, BS EN 1329, DIN 19531, BS EN1401, EN 1455-1, EN 1452 UNDER GROUND SEWERAGE APPLICATION: BS 4660, BS 5481, DIN 19534, BS EN 1401 ELECTRICAL CONDUIT & TELEPHONE DUCT: BS 6099-2 & SPECIAL DUCT SIZES, NEMA TC-2, NEMA TC-6 & TC-8 PRESSURE APPLICATION: BS 3505, BS 3506, DIN 8061/8062: DIN 19532, ASTM D 1785: SCHEDULE 40 & 80