Sui Northern Gas Pipelines Limited (SNGPL) invites 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 air compressors with pressure ratings of 150 PSIG and 250 PSIG. The tender is intended for foreign and international bidders with valid tax clearance certificates and active taxpayer status. The procurement process requires submission of pay order or demand draft along with proof of tax compliance for issuance of tender documents.