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Search results with tag "Grade b7"
STANDARD BOLT IDENTIFICATION MARKINGS
www.aptp.comGrade B6 Bolts, Screws, Studs for High‐ Temperature Service ASTM A193 Grade B7 Bolts, Screws, Studs for High‐ Temperature Service AISI 4140, 4142, or 4145 1⁄4 thru 2 ½ Over 2 ½ thru 4 Over 4 thru 7 −− −− −− 105,000 95,000 75,000 125,000 115,000 100,000 ASTM A193 Grade B16 Bolts, Screws, Studs for High‐ Temperature
Correct procedure for flange bolting Installation Procedure
www.ultratorq.comFor this, use high-strength alloy bolts (ASTM B 193 Grade B7 is suggested) during the tests. They may be removed upon test completion. Higher stress values required to seat the gasket during hydrostatic tests at higher than flange rated pressures may cause the standard bolts to be stressed beyond their yield points.