we have a pressure vessel having following specsifications:

0.03 kg/sq.cm & 140 degree Centrigrade
Shell = carbon stell ASTM A516 Gr. 55 thk. 13 mm
cladding= AISI 304L thk. 3 mm
Design Code =ASME Sect. VIII Div. 1

Due to the reduced thickness of shell cladding , vessel's shell courses was ...

If u r in pakistan, scissor lifts can be bought from ELFY group (Al-Nazeer Engineering ... i guessed right) its a cost effective solution. It works good... i have seen one in a fertilizer plant at karachi but was used in shops there...


they can be handy for simple piping work at pipe racks...

Can you provide some reference to corrosion rate for 316L UG.

Arcpro: For 316L UG, the corrosion rate in huey test stands at 0.6 mm/year and for 316L it would be above this value.


To my knowledge, 316L UG has corrosion rate of 0.3 mm/year. (with reference to Heuy tests)
& 0.18 mm/year (25Cr ...

Excellent work... Thanks

Thanks for ur observations and suggestions.

Good news is that the vibration on the machine have reduced. The maintenace activities carried on the machine are:
1. Sleeve bearing inspection (Found ok)
2. FOundation bolts tightened. (Found slightly loose)

Attach also found vibration data of the point ...

Currently, as soon i get the data i will provide it...
we have to perform tests on the machine tomorrow... what sort of tests should we be focusing to clear ourselves regarding the problem...

Attached find more data

M1P - Motor outboard peakvue
M1A- Motor outboard axial
M2P- Motor inboard peakvue
C1P- Compressor inboard peakvue
C2P- Compressor outboard peakvue

Hope this clarify the problem...

You can also do the following as we practice:

1. High Pressure Loop thermowell to be inspected by DPT during every TA. (Currently we ensure 100% on Urea HP Loop Thermowells and rest of thermowells are checked whenever their equipment is opened)
2. Check Valves to be dismentled once in 4 years. You ...

We have Motor driving Reciprocating compressor with following specifications:
OUtput: 1410 kW
Voltage: 6300
Amps: 170
Phase: 3
Frequency: 50 Hz
Rated Speed: 295 RPM
Speed Monitored: 299 RPM
Stator winding 168 slots wound with a 2-layer lap winding
Rotor WInding: 204 Slots with cage rotor winding ...

Thanks