BTS - Bolt Tightening Software

Standard ANSI B16.5 Flanges manufactured from material with yield strength equal to or greater than 247N/mm2 (35840lbs/In2)

ANSI B16.5 Flange specification does not implicitly specify a minimum target bolt stress. The software will suggest recommended target bolt stress values for these flanges. The recommended values are based on the experience of Tentec Limited and are used without any guarantee or liability to Tentec Limited.

The recommended bolt stress values assume that flange material yield strength is equal to or greater than 247N/mm2 (35840lbs/In2).

DO NOT USE THE RECOMMENDED ANSI B16.5 BOLT STRESS VALUES FOR FLANGES MANUFACTURED WITH MATERIAL YIELD STRENGTH LESS THAN 247N/mm2 (35840lbs/In2)

The data produced by this software is only applicable when using Tentec Bolt Tensioning Tools.

Flange Service Temperature range for the recommended bolt stress values are -101ºc to +200ºc. Or as limited by the piping class specifications or the the bolt minimum or maximum temperature specification. Do not use the recommended bolt stress values outside of this range of temperature.

Important Information
The software assumes that adequate strength flange materials are being used. Stainless Steel 316 flanges are not to be tensioned with the recommended bolt stresses.

The following flange materials or equivalents are suitable for the recommended bolt stresses.
ASTM A105
ASTM A182 Grades F65
ASTM A182 Grade F60
ASTM A182 Grade F52
ASTM A182 Grade F50
ASTM A182 Grade F51
ASTM A350 Grade LF2
ASTM A350 Grade LF3
ASTM A694 Grade F52
ASTM A694 Grade F60
ASTM A694 Grade F65