Profile: Special Piping Materials Ltd supplies pipes, fittings and flanges. Our products include seamless pipes, welded pipes, butt weld fittings, flanges, forged fittings, branch fittings, spectacle blinds and spades & spacers. Our seamless pipes are finished to specific thickness and dimension specifications measured by their outside diameter (OD) and wall thickness. By designating the outside diameter, pipes with the same OD can fit together regardless of differences in wall thickness. Spectacle blinds consist of a ring (spacer) and a plate (spade). In the event of an item of equipment being shut down, the plate covers the ring to form an airtight seal. Our spectacle blinds are designed to ensure that an item of equipment can be securely blanked off, with no possibility of leakage in the valve.