Sui Southern Gas Company Limited invites sealed bids for supply of Polyethylene Pipe (PE-100) 20mm with a quantity of 73,200 meters. Delivery is scheduled at 20,000 meters per month to Karachi Main Store, Khadeji Store, and Karachi Terminal with a lead time of 30 days after purchase order placement. Bidders must be active in the FBR Active Tax Payer List and local manufacturers with valid ISO-9001 certification. The tender follows a single stage two envelope bidding procedure with an earnest money fixed bid bond of PKR 117,000. Evaluation criteria include delivered cost, past performance, and preference for local manufacturers with a 10% trial order.