5505L FLANGE BOLT DISCS

Transcription

1 MECHANICAL PACKING INSTALLATION INSTRUCTIONS 0L FLANGE BOLT DISCS PREPARATION Ensure stud threads are long enough to allow nuts to make contact with metal faces. Precaution: Good bolting practice requires a minimum of two threads above the nut after final torquing to insure all threads are fully engaged (Figures A and B). For a bolt or stud in a tapped hole, the general rule is to. times the bolt diameter of full thread engagement in the hole (Figure C). All threaded fasteners should be cleaned and inspected prior to reinstallation. Wire brush the bolts/studs and nuts to remove any rust, dirt or old lubricant. The nuts should turn freely by hand the entire length of the threaded portion. Use a clean-up tap or die nut if necessary to remove burrs. Fasteners that have broken, chipped or missing threads, or exhibit corrosion or other defects are not acceptable for use. Replace damaged fasteners with the same grade material and to the same specification as the originals. Use of damaged bolts/studs or nuts can result in insufficient gasket stresses and chronic leakage problems with the flange. * Figure A Figure B STUD HEX BOLT (thru hole) Figure C HEX BOLT (tapped hole) 0L Disc Set 0L Disc * Threads minimum showing. CAUTIONS These instructions are general in nature. It is assumed that the installer is familiar with the equipment, with flange bolt discs and with the requirements of the plant for the successful installation of live loading. If you have questions contact your supervisor, plant contact or Chesterton Specialist for assistance. The system or equipment should be shut down, depressurized, drained and cool before proceeding with installation. Observe all plant safety requirements. *

2 INSTALLATION. All thread contact areas, nut faces and discs should be liberally lubricated on all surfaces with nickel anti-seize compound or parting lubricant. Chesterton recommends Chesterton, Nickel Anti-Seize Compound or Parting Lubricant.. Place one disc on each end of the bolt or stud (see Figures A, B & C) and hand-tighten.. Tighten bolt or nut in a cross diagonal bolting pattern*.. Torque should be applied incrementally**. Pass Bring all nuts up hand-tight; then snug-tight evenly Pass Torque to a maximum of 0% of final torque. Check that flange is bearing uniformly on gasket. Pass Torque to a maximum of 0% of final torque. Pass Torque to 00% of torque. After the four basic torquing passes are complete, continue torquing the nuts using the final 00% torque in a clockwise manner around the flange until no further rotation of the nut is observed. This process may require an additional five to seven passes. *Refer to Various Bolting Patterns. **Refer to Torque and Disc Selection Tables. NOTES. Torque calculations based on thread lube with a. coefficient of friction (K factor). To adjust torque for other lubricants, divide the torque given by. and multiply by the K factor of the lube being used. See example (using a K factor of.): EXAMPLE a.) Recommended torque = N M b.) N M =. c.) x. = N M d.) Recommended new torque: N M. 0L Discs are not intended for repeated installation and removal.. For Heat Exchanger or other critical applications, contact a Chesterton Representative for full review of the sealing system to determine optimum bolt torque values for the gasket used.. Avoid the use of 0L Discs in the presence of hydrogen sulfide (HS) and hydrofluoric acid (HF).

3 TORQUE AND DISC SELECTION TABLES ABOUT TORQUE AND DISC SELECTION TABLES: Bolt torque values are predicated on bolt material only (see Note ). Values in bold are generally recommended for pipe flange applications. Bolt Size BOLT MATERIAL: ASTM A9, GRADE B & B BOLT YIELD STRENGTH (ALL SIZES." AND UNDER): 0,000 psi, 0 N/mm Disc Class Nominal Bolt Stress Disc Reorder Number Recommended Bolt Torque to Achieve Nominal Bolt Stress psi N/mm lb-ft N-M M " M /" M0 /" M /" M /" M9 CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, ,00 CLASS A 0, CLASS B, ,0 CLASS A 0, CLASS B, ,0, CLASS A 0, ,0 CLASS B, ,, CLASS A 0, ,90 CLASS B, ,,9 CLASS A 0, , CLASS B, ,,00

4 TORQUE AND DISC SELECTION TABLES (continued) Bolt Size BOLT MATERIAL: DIN EN ISO 9-, CLASS. BOLT YIELD STRENGTH (ALL SIZES THROUGH."): 9,000 psi, 0 N/mm Disc Class Nominal Bolt Stress Disc Reorder Number Recommended Bolt Torque to Achieve Nominal Bolt Stress psi N/mm lb-ft N-M M " M /" M0 /" M /" M /" M9 CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, ,0 CLASS A 0, CLASS B, ,09 CLASS A 0, CLASS B, ,0, CLASS A 0, ,0 CLASS B, ,, CLASS A 0, ,90 CLASS B, ,,9 CLASS A 0, ,0 CLASS B, ,,009

5 TORQUE AND DISC SELECTION TABLES (continued) Bolt Size M " M /" M0 /" M /" M /" M9 Disc Class BOLT MATERIAL: DIN EN 09,., GRADE CrMo BOLT YIELD STRENGTH:,000 psi, 0 N/mm Nominal Bolt Stress Disc Reorder Number Recommended Bolt Torque to Achieve Nominal Bolt Stress psi N/mm lb-ft N-M CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, CLASS A 0, CLASS B, ,0 CLASS A 0, CLASS B, ,0 CLASS A 0, CLASS B, ,0, CLASS A 0, ,0 CLASS B, ,,0 CLASS A 0, ,90 CLASS B, ,,9 CLASS A 0, , CLASS B, ,0,00

6 VARIOUS BOLTING PATTERNS Sequential Order BOLTS Sequential Order BOLTS 9 0 Sequential Order BOLTS 9 0 0

7 VARIOUS BOLTING PATTERNS Sequential Order BOLTS Sequential Order 0 BOLTS Sequential Order BOLTS

8 Chesterton ISO Certifications available at 0 Salem Street Groveland, MA 0 USA Telephone: Fax: A.W.Chesterton Company, 00. All rights reserved. Registered trademark owned and licensed by A.W.Chesterton Company in USA and other countries. FORM NO. EN99 REV. PRINTED IN USA 0/0