Huge time and safety mar­gins with high tem­per­a­ture bolt­ing

DEMM Engineering & Manufacturing - - MAINTENANCE MATTERS -

An Aus­tralian in­no­va­tion is mak­ing light work of some of the largest and most dif­fi­cult bolt ten­sion­ing ap­pli­ca­tions en­coun­tered in high tem­per­a­ture ar­eas of elec­tric­ity gen­er­a­tion, min­ing, petro­chem­i­cal and other pro­cesses.

In a re­cent ap­pli­ca­tion, Tech­no­fast In­dus­tries’ new Ez­iTite TR High Tem­per­a­ture Hy­draulic Nuts demon­strated their per­for­mance when they were used to as­sem­ble boiler feed pumps at an elec­tric­ity gen­er­at­ing plant in South Korea.

This ap­pli­ca­tion in­volved the use of 12 large Ez­iTite TR High Tem­per­a­ture Hy­draulic Nuts fit­ted to M110 X 4.0 studs.

The tem­per­a­ture re­sis­tant fas­ten­ers were used to re­place the for­mer method em­ploy­ing large torque wrenches weigh­ing more than 125kg.

The Tech­no­fast method re­sulted in an in­stal­la­tion time of around thirty min­utes us­ing two per­son­nel, com­pared with eight hours and four per­son­nel us­ing the pre­vi­ous method.

Tech­no­fast’s Founder and CEO John Buck­nell ex­plained that time sav­ings of this or­der, and bet­ter, are pos­si­ble us­ing the Ez­iTite fas­ten­ers in­stead of con­ven­tional meth­ods in­volv­ing sledge­ham­mers, stud heaters and multi-jack­bolt ten­sion­ers.

“Large nuts of this di­am­e­ter can re­quire ter­rific torque forces to achieve the de­sired ten­sion­ing, or re­quire ‘jack­nuts’ which have mul­ti­ple forc­ing screws to bring the job within the power range of hand tools.”

“The screws, of­ten 24 per nut, have to be pro­gres­sively and se­quen­tially tight­ened to a spe­cific torque at each step. This can add days of down­time to a typ­i­cal main­te­nance op­er­a­tion.”

“Also, when jack­nut fas­ten­ers need to re­moved, the forc­ing

Newspapers in English

Newspapers from New Zealand

© PressReader. All rights reserved.