Precision. Consistency. Confidence in Every Flange Assembly.
Proper bolt tightening procedures are essential for achieving a safe, leak-free flange connection in industrial piping systems. Inconsistent torque application and incorrect tightening sequences are leading causes of gasket failure, flange leaks, and equipment downtime. The Durlon® Bolt Tightening Worksheet provides a standardized, step-by-step method for flange assembly, bolt torque control, and gasket installation, helping maintenance teams and engineers ensure uniform bolt load, proper gasket compression, and long-term sealing performance.
Designed for field use and quality control programs, this worksheet simplifies complex flange tightening sequences and supports best practices for industrial maintenance, pipeline reliability, and pressure system safety.
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Durlon® Bolt Tightening Worksheet
Beyond bolt tightening, effective Gasket Installation is critical to the integrity of any bolted flange connection. A gasket’s ability to seal fluids and gases depends not only on material selection, but on precise installation practices that ensure even stress distribution, proper compression, and alignment of flange components. Improper installation can lead to leakage, reduced efficiency, environmental risk, and premature equipment failure.
Best practices include thorough inspection and cleaning of flange faces, bolts, and washers, as well as correct lubrication of fasteners. They also include the use of new, properly specified gaskets that are never reused or stacked. Controlled tightening in multiple passes using a cross-pattern sequence ensures gradual and uniform gasket compression, while maintaining parallel flange alignment.
Equally important is the application of incremental torque loading (e.g., 30%, 60%, and 100% of target torque), followed by a rotational pass and final re-torque to compensate for initial preload loss. These steps help achieve consistent bolt stress and minimize the risk of leakage over time.
Durlon’s Gasket Installation Training further reinforces these principles through hands-on, real-time learning using flange assembly demonstration units. Participants gain insight into bolt stress behavior, gasket deflection, and the interaction between fasteners (“crosstalk”), emphasizing the importance of following established standards such as ASME PCC-1. This practical training builds confidence, improves installation accuracy, and promotes repeatable, high-quality results across maintenance teams.
By combining standardized procedures, proper installation techniques, and practical training, organizations can significantly extend gasket life, reduce maintenance costs, enhance safety, and ensure long-term reliability in critical sealing applications.