MGT Consulting Network Blog

Stan Yokell is now a Life Member of the American Society of Mechanical Engineers (ASME) and the American Welding Society (AWS)

A new post on the MGT Blog at http://syokell.blogspot.com/ discusses hydrostatic testing heat exchangers, with emphasis on testing when leaks are not visible as in fixed tubesheet designs and typical closed feedwater heater construction. It discusses weeping from the channel side to the shell side and points out that the gages customarily used in heat exchanger shops to determine whether there is leakage from the channel to the shell through the tube-to-tubesheet joints by pressure loss are inadequate for indicating weeping. The post on the blog poses questions about the ASME Code’s requirements and suggests cautions that Users, Designers and Manufacturers should take for constructions in which leakage is not visible.

The State of Iowa has awarded Stanley Yokell the Professional Engineering license to practice Mechanical Engineering.

Chemical Engineering magazine has accepted for publication at a date to be announced, Stanley Yokell’s article, “Full Length Sleeving Process Heat Exchangers”. The article discusses using sleeving tubes that have different coefficients of thermal expansion than the parent tubes and provides a method of determining it the sleeve metal is acceptable for the operating condition

MGT Inc., which has made hundreds of presentations in-plant and at public offerings of our courses, “Shell-and-Tube Heat Exchangers – Mechanical Aspects”, Closed Feedwater Heaters – Mechanical Aspects”, “Tubular Exchanger Inspection, Maintenance and Repairs”, “Tube-to-Tubesheet Joints”, and “Power Plant Heat Exchangers”, is no longer presenting these courses. However, these courses are available for sale on CDs with Power Point presentations and complete course notes in PDF format. This are accompanied by DVDs with videos that illustrate the material. Please see http://www.mgt-inc.com/products_services/ for pricing and availability.

The Power Point presentation of Power Plant Auxiliary Heat Exchangers and Closed Feedwater Heaters – Mechanical Aspects is now available for purchase.

This course has been presented in-plant at a seminar for nuclear plant engineers.

Purchasers will receive a CD with the Power Point presentation and the complete set of course notes in PDF format.

Price: US$390

Payment by Check or Purchase order only. Credit Cards are not accepted.

The updated version of the MGT Inc. Closed Feedwater Suite is now available. The suite consists of an MSWord Generic Procurement Specification for procuring new and replacement closed feedwater heaters and replacement bundles, PDF versions of Guide to Plugging Feedwater Heaters, Specification for Performing Feedwater Heater Autopsies and Xcel Spreadsheets for estimating the thermal and pressure drop effects of sleeving feedwater heater tubes.

The current price is $325 plus shipping and handling. Orders will be shipped within two business days.Payment by check only.

Stanley Yokell has submitted his paper, “On Hydrostatic Testing Heat Exchangers” to the Journal of Pressure Technology. The ASME has assigned PVT-8-1122 to the paper during consideration of acceptance and peer review if accepted for publication. Here is the abstract.

ABSTRACT

This paper discusses the requirements of Section VIII Division 1 of the ASME Boiler and Pressure Vessel Code (the Code) for hydrostatically testing shell-and-tube heat exchangers. It uses an approximate calculation method to delmostrate that the common practice of using pressure gage indications of pressure loss to determine if there is a leak from the tube side to the shell side when the back face of the tubesheet is not visible is flawed and does not meet the basic no-leak requirement of the Code.

Chemical Engineering Magazine has published Stanley Yokell’s article, “Maintaining and Repairing Heat Exchanger Tubes” in the March 2008 issue. Details of what is in the article are available on his professional blog at http://syokellpefasme.blogspot.com/.