PRODUCT OVERVIEW
IPP Deltaflex® Flange Engineering

Improved Piping Products, Inc. (IPP) has patented the second generation convoluted pipe back-up rings and markets that technology under the registered trade name of IPP Deltaflex® flanges. The unique design technology significantly reduces the weight of a flange without reducing its pressure performance.

PRODUCT OVERVIEW IPP Deltaflex® Flange Engineering The finite element analysis (FEA) tool utilized by IPP is ANSYS 5.3. Using these tools, the company has examined the stress levels inside standard piping flange joints and in the adjacent pipe walls. From this analysis, IPP has confirmed that nationally recognized pipe flanges are very conservatively stressed while the adjacent pipe walls often exceed allowable code stress values, in many cases approaching the yield point of the piping material.


Figure 1: IPP Deltaflex® flange DF2DI 250-10 (10 bar)


Figure 2: conventional steel flange 250 mm 10 bar


Figure 3: IPP Deltaflex® flange on stub end

In response to this IPP Deltaflex® flanges are designed to allowable code stress levels with a safety factor of 2. Even with this generous safety factor IPP Deltaflex® flanges are much lower stressed than the abutting pipe wall material. Therefore a properly selected IPP Deltaflex® flange is not the weakest link in a pipe system when the adjacent pipe wall is closely examined. IPP Deltaflex® flanges are safe, functional structures with an attractive economic dimension. They conserve material and energy resources from manufacture to point of installation. The lower weight translates into several benefits:

• Lower cost of raw material and energy
• Reduced transport costs
• Ease of handling and installation

The IPP Deltaflex® flanges can be substituted for a conventional pipe flange as called out in DIN, ANSI B16.5, B16.47 and AWWA C207. Its unique cross section can save up to 40% of the weight of one of these national pipe standard flanges. Some installation practices have thinned the standard flanges for economic reasons. In these instances using IPP Deltaflex® flanges design principles can reduce the critically high stress levels to a stated safety factor. This performance is achieved by using IPP Deltaflex ® flange engineering to increase the section modulus of the flange without increasing its weight. See figure 1 & 2, comparison of IPP Deltaflex® flange and conventional steel flange.

IPP has installed literally millions of its patented convoluted flanges in the entire spectrum of code controlled commercial and industrial pipe systems. The design technology has consistently been the specification choice of world renowned piping engineers. The IPP Deltaflex® flange truly satisfies the claim of being a modern, high performance pipe flange. Pound for pound there exists no other pipe flange that can safely carry structural loads as efficiently as an IPP Deltaflex® flange.

We welcome your inquiry and request for presentation .