Session: CT-01-01 Design and Analysis of Bolted Flange Joints-1

Paper Number: 123349

123349 - Asme b16.20 Compression Validation for Large Spiral Wound Gaskets 

            ASME spiral wound gaskets are widely used in many different industries. It is one of the most common gasket types and readily available in the market. During construction of spiral wound gaskets, the manufacturer is responsible for determining the filler thickness and density of windings. To validate those selections, the gaskets must pass a leakage and compression criteria set by ASME.

 

            For this paper, we will focus on the compression test, where the requirement of the finished gasket shall be subjected to a uniform gasket stress and shall not be less than 0.135” after compression. The required force can be calculated using the gasket’s seating area and the predetermined gasket stress is set by ASME. These values can be found in ASME B16.20 section SW-2.2 Construction.

 

Testing smaller gaskets is a relatively straightforward process, however, this is not feasible as you move up the gasket NPS and Pressure Class. The primary obstacle is the available force from a compression test machine. Common compression machines have an upper load limit that ranges from 150,000 lbf (667 kN) to 600,000 lbf (2669 kN). Another constraint is the diameter of the compression machine’s plates. These limitations make testing for large gaskets impractical, especially when dealing with gaskets for ASME B16.47 Series A and B flanges.

 

            In this paper we are proposing a method to validate larger gaskets by testing them in segments, where the gasket will be positioned partially under the compression machine. The localized stress applied can be calculated by using the required stress per ASME within the gasket contact area. We identified gasket sizes that could be fully and partially compressed and compared their compressed thickness.

 

LAMONS

TOMMIE BAO

C. VON HUGO

 

Presenting Author: C. Von Hugo Lamons

Presenting Author Biography: C. Von Hugo, originally from Provo, Utah has spent 10+ years in Texas working in the oil and gas industry, with his primary focus on production design and continuous improvement. His work has improved the operational efficiency and cost of manufacturing of fiberglass frack plugs, specialty bolting, and gaskets. He has earned his Bachelors Degree in Mechanical Engineering from BYU - Idaho, with emphasis in both robotics. He is currently based out of Houston, Texas representing Lamons as a Senior Applications Engineer helping customers with tailor made sealing solutions.

Authors:

Tommie Bao Lamons
C. Von Hugo Lamons