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Check out this reference document... http://www.vdma.org/wps/wcm/resources/file/eb4d5705b488435/VDMA-Information_Sheet_Riboflavintest_Dec_2007.pdf Please share any riboflavin test information that you have? Bob

Occasionally we are requested to fabricate a header system. Typically the header system will be mounted horizontally. It will have a main feed pipe with several branch pipes that are perpendicular to the main feed pipe. The branch pipes will be connected to the main pipe by using a branch...

metengr, thanks for the reply. I read (b) as for design temps above the test temps.....this application design temp is 1400°F and the test temp is ambient. Am I missing something here? any additional comments?

We are being contracted to fabricate an austenitic(316) pipe in pipe lance feeding a dual liquid nozzle(air and steam). Process pressures are 80psi. 80 psi in the inner pipe and 80 psi in the outer pipe. Lance will be operated in a duct exposed to 1400°F gas temp. Typically we receive only...

why not use 309L for root pass and fill and cap with cs filler?

B31.3

The A36 is 10" pipe, eventaully having the id hardfaced. I dont see any prior purging of the interior of the pipe required in the past. I am working with a new fabricator...just welded up his test coupon..be it a pipe coupon...gtaw process for the root pass 309L...smaw process using flux cored...

I need to weld 1/2" a36 to 1/2" a36 which will eventually be overlayed one side with hard face. The customers spec is tig root pass with 309l and fill and cap with 309l. Why this process....should the weld be purged? Any help with generating a WPS? Bob

I have a 1" 316H pipe w/alloy 625 bellow in 2" 316H outer pipe..it is a spray lance. There is a class 300 flange welded to the outside pipe to be able to get it into a 1150°F duct. It is a B31.3 application also requiring a CRN. What are the minimum calculations that will be required for this...

It is NI 99 0.125" thick. The 6" pipe is part of a spray lance. The 6" pipe section is welded to a 8" 600# flange. The other end (spray end) has a 6 x3 conical reducer and a 3 x 2 conical reducer ending with a small air atomizing nozzle. the 30" 6" pipe section along with the conical reducers...

the overlay is NI99 0.125" thick. Bob

I need some help in predicting shrinkage of pipe after it has been overlayed with nickel. I have a 30" long piece of 6" sch80 304ss pipe that will be overlayed with nickel. Any help will be appreciated. Bob

I need some help in predicting shrinkage of pipe that has been clad with nickel. I have a 30" piece of 6" sch80 304ss pipe. If it is overlayed with nickel how much will it shrink? Bob

the load the nozzle would see is calculated by dead heading the nozzle. So inrelaity the nozzle may never see this type of load. the typical load on the nozzle while being used would be constant. Bob

the nozzles range in size from 4" TO 16". A 4" nozzle would see a max force of 500lbs, a 6" nozzle would see a max force of 1100lbs, a 8" nozzle would see a max force of 2000lbs, a 10" 3000lbs, a 12" 4500lbs, 14" 7000lbs, 16" 8500lbs. Bob

I need to determine acceptable torque limits for the silicon carbide nozzles that we produce. They range in size from 4" up to a 16" nozzle(300lbs). The flanges have the same number of holes and the same bolt holes as Class 150 flanges. Bob

ornerynorsk thanks for the reply. I am working with manufacturers of this stuff, but I am looking for someone with field experience using these products. How do these components hold up over time in the field. Any deigner input from somebody that has gone down this road...

Mandrake22 thanks for the reply. I think an all stainless construction sounds appropriate for the cylinder, aluminum would not hold up well in an all water application. Bob

Does anyone have any experience with using a hydraulic cylinder with water? I am thinking of using a double acting cylinder as a spray bar oscillator. This application will require adjustable stroke and adjustable speed. Thanks in advance for any information. Bob