Sui Northern Gas Pipelines Limited (SNGPL), a gas transmission and distribution company, is inviting sealed bids from original manufacturers, authorized distributors, dealers, and suppliers registered with Income Tax and Sales Tax Departments. The procurement is for the supply of door closures and pig signallers. The tender is open to foreign and international bidders with valid professional tax clearance certificates and active taxpayer status. The tender documents require a purchase fee and proof of tax compliance. The procurement aims to ensure reliable supply of these components for operational needs.