Sui Northern Gas Pipelines Limited invites sealed bids from original manufacturers, authorized distributors, dealers, and suppliers registered with Income Tax and Sales Tax Departments for the supply of valve lubricants. Bidders must possess valid Professional Tax Clearance Certificates and be active taxpayers listed by the Federal Board of Revenue. Bidding documents are available on the EPADS portal and must be downloaded and submitted electronically by the specified closing date and time. A bid security in the form of a bank draft, pay order, or bid bond is required along with the bid submission. Bids will be publicly opened on the closing date at the specified time.