Tried contacting Dresser on e-mail and over phone , however couldnot get a satisfactory answer. Seems to be non committal as the vibrations were caused due to the valve casting geometry.
These are coming under the category of Special Valves supplied by Dresser Italia( Masoneilane ) for the gas...
Would like to know whether axial control valves of dresser design can be used in either direction of flow. Can any one guide specifically about Dresser Valve Model 78-AX-1/HW. What is the effect of using the control valve with a Fail: Close , Air: to clsoe with Flow : To close configuration used...
Dear Chicopee,
The chance of having any ethylene vapor is remote, as the plant was yet to be commissioned, though trial of the ethylene compressor was done with the associated systems and purging and inerting using nitrogen gas was done. Also as the pressure required for any ethylkene gas is...
Additionally if we are to repair the tank which of the codes to be considered, API 620 only or API653. The replacement of a full plate shall need the removal of the HAZ as well as per the codes. How to address the same, ie. adjusting the plate size including the extra removed portion of the HAZ...
The above tank is dsigned to API 620 appendix Q , with an inner tank of ASTM A 353 material 31.2 diax 21.2 m height. The outer tank is of 33.2mx 24.2 m height. The inner tank is resting on hard wood block annular foundation , the bottom annular plate of the tank is 9.8 mm and the bottom center...
The above tank is dsigned to API 620 appendix Q , with an inner tank of ASTM A 353 material 31.2 diax 21.2 m height. The outer tank is of 33.2mx 24.2 m height. The inner tank is resting on hard wood block annular foundation , the bottom annular plate of the tank is 9.8 mm and the bottom center...
However in one of the earlier replies in the same forum I notice that the recommended continous use, maximum temperature to be as 412 Degree celsius. Can any one clarify.
Also the use of P11/P12 , what is the maximum allowable continous operating temperature.
What is the maximum allowable temperature for use of ASTM A 106 Grade B. Can ASTM A 106 grad B material be used for superheated steam service at 420 degre celsius. Is there any limitations as per the code B31.1 for use at this temperature. If so can it be used for vent and drain lines.
