I feel somewhat vindicated. Of course, this could be alleviated by leaving a small gap in the external fillet weld. With a growing number of parts manufactured directly by additive manufacturing techniques, it is important to lay down design principles suitable for such manufacturing processes and to ensure parts are designed for additive manufacturing. Few such design issues in additive manufacturing are discussed in this paper. The only real justification is to make it easier to deal with poor fabrication practices (e.g., misaligned flanges).Thanks for that rneil.

In over 30 years of oil and gas pipeline work, can you believe I never used either one of them.The following is an excerpt from my article on the the pipingdesigners.com web site.I can't add much to pennpiper's excellent post other than to say that slip-on flanges are not normally permitted in sour service as the space between the flange and the pipe can trap hydrogen. The backing flange can be of different material than stub material and normally of the carbon steel to save the cost. This paper discusses the use cases of partial reconfiguration as well as considerations when designing partial reconfiguration firmware using the Xilinx Vivado design tool targeting the RFSoC. Well I've seen Slip-on flanges used in a chemical processing plant - all low pressure steel lines. Lap Joint Flange.

Plastic parts not only need to meet the short-term color and appearance requirements, but also need to be resistant to long term color shift and fading. A Lap Joint Flange is a two piece device that is much like a weld-neck flange but also like a loose slip-on flange.

This paper discusses various points related to aesthetics of plastic parts and what design engineers need to know about science of color and appearance. Please let us know here why this post is inappropriate.

Stub end is butt welded to the pipe and Backing flange freely move over the pipe. A loose flange (lap joint flange) is a device that is welded onto the end of a piece of pipe to create half of a flanged coupling. However, you still can't effectively radiograph the fillet welds.I think I'll go another 10 years w/o them. By joining you are opting in to receive e-mail.Promoting, selling, recruiting, coursework and thesis posting is forbidden. Stub-end flanges are also known as lap-joint flanges; use them with a stub-end straight adapter (not included). Generally, if you consider the additional welding time for the two fillet welds on a slip on flange, while the purchase price is lower, there is usually no savings in installation cost.

Use of simulation tools play an important role as well. The stub-end straight adapter slides into the flange and welds to pipe (not the flange). Lap joint flange.

The same plant had (loose) lap joint flanges on the SS lines.



One piece is a sleeve called a 'Stub-end" and is shaped like a short piece of pipe with a weld bevel on one end and a narrow shoulder on the other end called the hub. Again, all mostly low pressure Sch10 stuff and weld necks would have considerably added to the cost.

Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.Partial Reconfiguration (PR) allows FPGAs to dynamically change modules without disrupting other parts of the design. *Eng-Tips's functionality depends on members receiving e-mail.

This paper also throws light on DFMPro – a design assistant solution.

Lap joint flange (simplified as LTF flange) shape is similar to slip on flange, it has a curved radius at the bore, which can connect with a stub end fittings and slide over the pipe.

People always say it is similar with slip on flange and have components, a stub end, and a loose backing flange.

This text is an extract from questions gathered from numerous queries of anonymous people in the Piping Engineering and Design profession. I imagine that the cost savings over weld necks would have been substantial.