...it, so its thickness must be increased; and for GRE/GRP it is usually 2 to 3 times increase.
If you are not familiar with this type of material for pipes, then don't use it.
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...your case, you have 40 bar service pressure, the safety device is set at 1x 40 bar = 40 bar and the relief valve at 1.1x 40 bar = 40.4 bar (maybe there is 0.1 bar tolerance)
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Why do they need to cool the air that much?
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...strong wire brushing on the steel lugs before welding them. A bit of wiping on the zinc surface will do.
Just ensure they don't get flooded during the storage period !
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...on weld fabricated ones.
In your description this is not an acceptable weld repair, but should be considered a weld overlay to recharge the thickness of the flange face.
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This pipe must be manufactured to a standard (API 5L, ISO 3183, DNV-GL, GOST, etc).
The dimensional tolerances are defined in this standard.
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...you will deal with a 1000 km pipeline single section (Turkish stream, each of the 4 subsea gas pipelines), then we can have a serious discussion on what testing can be done.
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I wouldn't worry about weld metal because weld consumables are over alloyed and result in enhanced properties.
However the HAZ being a mix of both and will be weaker.
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As the standard highlights, it's highly chemistry dependent. Could you please post the ladle analyse of the plate?
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...will include some sacrificial allowance.
In caustic environment (pH > 8) carbon steel will passivate by creating a stable oxide. More stable than in acidic environment.
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...40 bar to switch off the heat pump, the safety pressure relief valve is set just above it to discharge over pressure and prevent catastrophic failure of the pump circuit.
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...the basics here http://www.electrical-knowhow.com/2012/04/hvac-control-systems-and-building.html?m=1
Then you can decide which specific system you want to learn more about.
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...Usage?
All these materials are fairly compatible to each other in domestic systems. So what is the external trigger that makes them fail together? is the question to answer.
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...surfaces bare under non adhesive insulation is looking for corrosion troubles (but some people like it because this is obsolescence and this is their business model).
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...(unless the concrete is porous, i.e. badly made and poured). Also the anode to cathode ratio is at the benefit of the weld metal and won't easily corrode galvanically.
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You can predict this risk of condensation considering indoor/outdoir conditions with a software like BuildDesk U.
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The IT helpdesk recommended Archos tablet.
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Natural and weatherproof. Easy and simple, always.
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To obtain the same silver finish as painting, you will need multiple passes of blasting (grit/shot various mixes).
So the overall cost would not be much different!
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