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When specifying a fab shop hydro of pressure parts, do you require a minimum level of water quality? request fabricators procedure? or use a water quality standard? Thanx in advance

Is there a standard or formula based on carbon equivalent to assist in determining max interpass temps for low alloy, chrome bearing steels up to 9% Cr??

What is the permissable amount of ovality in a carbon steel boiler tube after bending operations? I've been perusing thru Sect. I and II and not finding what I'm looking for. If ovality is not addressed in Sect. I, what standard do you apply for bend boiler tubes? Thanx in advance.

fazel1, IMO it depends on the wall thickness, material, inspection criteria, PWHT requirements, and most of all the level of welding talent available. At the beginning of a job I'll RT after 3/8", final, and post-PWHT. If the talent is there based on weld quality of first few RT's, I'll only...

Found this specification/grade in a 1950's Pipe Specification Table and was curious what significance the "52aT" had. Anyone know? Thanx in advance.

OK, thanx to all for the input. Was kind of enthused about the notion, but figured if it was a poor one, would not withstand scrutiny.

Let me clarify a bit, I was thinking in terms of injecting N2 or LN into HRH piping at existing test connections and venting in direction of roof exhausters.

Does anyone have experience with forced cooling of high energy steam piping with nitrogen? My goal is to reduce schedule time and improve safety for asbestos abatement workers removing insulation from hot reheat piping by reducing pipe temps to ambient upon shutdown asap. The pipe will be...

Most in place machining contractors have boat sample cutters, i.e.: PCI, MTI. Thielsh Eng does also. Make sure the operator is experienced using it, or the boat sample repair may be worse than the original failure mechanism. Also don't try to mount the cutter on the pipe diagonally. If you need...

Regarding Table QW-416 Filler Metals QW-404.23 Solid or metal-cored to flux cored: in the Brief of Variables column, the Legend symbol is "t" indicating thickness. Is that symbol correct or should the "Change" symbol have been used??

metengr, do you believe the formula you provided is applicable in evaluating boiler tube materials and overlays for use in waterwalls serviced by water cannons? Sorry to get off topic.

Thanx metengr. IP turbine application. Steam temp should be 980 to 998 F. We need to raise stationary blade ring elevations .050". Intent is to apply weld build up to 4"L x 2.5"W x .75"T spacers, then surface grind to required dimension. Actually my plan at present is to use Inco filler with 400...

I'm unfamiliar with this type stainless steel or it's weldability, yet have an emergent need to add .050" of weld build up to bars of this material for alignment purposes. Can anyone provide guidance?? Thanx is advance.

Thank you, Gentlemen. I have some EPRI materials on the way in addition to your helpful suggestions.

Can anyone help me locate a standard or specification for employing the half bead weld technique? Am considering using this or butter/temper bead to fillet weld shear lugs on a 2.25% chrome piping system in lieu of PWHT.

Mr. Breen, thank you for pointing me the right direction with your very helpful post. I'm sure ES-26 will be the most applicable reference document.

I'm trying to correctly size shear lugs for a Main Steam Pipe rigid hanger (donut clamp type). We are replacing a batwing style rigid hanger with a shear lug type. My understanding is that some of the calculations are based on data in WRC-107 and also reference Blodgett Table 5. Are these...