Inquiry (采购产品): cylinder pressures CGA pamphlet C-6 defines high/low pressures are those marked with a service pressure above/below 900 psi. My cylinder data for Halon and CO2 is defined as working pressure. Is there a difference between service and working pressure and if so, what is the difference? **** Hidden Message ***** Mark Alexander 1515 Miller Cutoff Rd. LaPorte, TX 77536 USA Company: Webb, Murray & Assoc. Inc. Title: Supervisor Phone: 713-209-1318 Fax: 713-209-1303 E-mail: marhsych@aol.com **** Hidden Message ***** marhsych@aol.com