Recent content by cadtocam

We have a heat treat indexing oven, gas direct fired combustion chamber design. If no solvent or any combustible materials inside oven enclosure, does it still need explosion relief design by NFPA code? Let me know. Thanks. John

When the job just completed the surface was clear, these small trees came out the surface 3 weeks after. The near surface soil is not sandy, it's soil & gravel; the sand was shipped here to cover the surface

Thanks for your advice. In the contract no detailed specification on lot clearing, just specified: (1) Trees & stubs to be removed (2) Lot to be leveled & compacted by 35 tons machine (3) Lot to be covered by 1” thick small stones or sand All small trees you saw on the photos attached to an...

I bought a piece of rural treed land & hired a contractor to clear a 80’x120’ building lot for cottage & recreational purpose this June. In the contract I clearly specified that all trees & stubs to be removed. However, just 5 weeks after there is lots of small trees come out from the cleared...

I am not looking for cheaper materials to build furnace rolls. The situation is that we sold a system with about 100 rolls for 2 furnaces: - One Austenitizing furnace operation temperature is 1000C, has 33 rolls use HP modified alloy, rolls total weight is about 40,000 lbs - Another Temper...

I am working on a project & using following high temperature alloys to build furnace rolls and it looks like it is out of budget, does anybody know the material cost of these alloys? If so, please share. Thank you. (1) HN (G-X35NiCrSi25-21 OR Pyrotherm G24/24 NbTz) (2) HP Modified...

Thanks Ron, but my contractor told me it is always measured from the outside for the driveway length. This confused me, as I am experienced mechanical engineer for similar application we always take the center line as length. Maybe the civil contractor have different standards ?! John

I have one question regarding the residential driveway: For a “L” shape driveway (with smooth turn), what’s the definition of this driveway length – measure from outside, inside or center line? Please advise. Thank you.

We have an infrared heat glass ink drying oven. The glass is carried by conveyor rollers. As the roller direct exposed to high temperature infrared heaters, its surface temperature can be as high as 800 F. The roller two shaft ends are hidden from infrared heater and their temperature is about...

Is there any internet resources talking about the technologies on aluminum wheel finishing? Thanks.

Is there any internet resources talking about the technologies on automotive plastic finishing? Thanks in advance.

Hi, Any body can tell me the difference between Satin Coat and Galvanized Sheet? Thanks.

Thanks for the information. Actually, this is an over 2 million dollar industrial project; oxidizer system is part of this contract. This contract was signed last December, now our profit already gone with the jumping steel price. For this heat exchanger construction we need about 1,100 ft long...

Does anybody knows the approx. price range of following 300 series stainless steel? If we set the price index for 304L is 1.0, what about: 304H 321 309 310 Thanks.

metengr & EdStainless thank you for your valuable information. For this application no halogens, sulfur, salts or acids attack, but no guarantee that this HX will be kept hot when oxidizer is not in use, this may cause big problem. Further more, to reduce material cost my boss wants to use 304L...