Hi,
We are facing large seat leakage over metal seated dual plate check valves during commissioning.
Valves are new and certificates show acceptable high pressure seat test hydrostatic (1,1*pd) and low pressure seat test pneumatic at 6 barg.
Valves will be installed in gas application.
At the...
Hi,
Anybody familiar with assessment of hydrostatic test pressures of Piping Systems?
Design code is EN 13480 - 3, so test pressure to be assessed as per EN 13480 - 5. Considering equotion 9.3.2-2 we need to know whether the cold design pressure, or the reduced hot design pressure applies in...
Hi,
Anybody familiar with assessment of hydrostatic test pressures of Piping Systems?
Design code is EN 13480 - 3, so test pressure to be assessed as per EN 13480 - 5. Considering equotion 9.3.2-2 we need to know whether the cold design pressure, or the reduced hot design pressure applies in...
Hi,
At our office we don't have the design code BS-8010 part 1 (which seems to be superseeded now). However, I'm looking for the formula to assess the hydrostatic test pressure of piping systems.
Anybody who can give me the formula, or refer me to it?
Thanks in advance.
Best regards,
FKE
Hi,
One of our clients intends to connect carbon steel piping to an existing AluBronze valve. The connection will be flanged with tapped bolt holes. Sealing will be performed by an O-ring. So there is no possibility to isolate the Alubronze from the Carbon Steel.
The fluid is sea water...
Hi,
One of our suppliers proposed ASTM B366-UNS N08367 as an alternative material for SMO UNS S31254. Although these materials are reasonable similar we do not know if any concerns should be highlighted regarding weldability.
The Nickel content of ASTM B366-UNS N08367 is about 6% higher (for...
Hi,
Anybody having experience in selecting trim materials for Valves? Specified was 17-4PH for Ball Valves in a non sour hydrocarbon gas application (high pressure class 2500#).
Fabricator have valves assembled with F6 internals (13% Cr.)
As far as we know 17-4PH is a better material with...
Hi,
Anybody having experience in selecting trim materials for Ball Valves? Specified was 17-4PH for Ball Valves in a non sour hydrocarbon gas application (high pressure class 2500#).
Fabricator have valves assembled with F6 internals (13% Cr.)
As far as we know is 17-4PH a better material...
Hi,
Within our company it's always a discussion to specify flange insulation sets (gaskets, bushing and washers) for flange connections of dissimilar materials (CS to SS) or not.
We don't have a corrosion engineer within our company.
Could anybody give me some reference to available...
Hi,
Anybody having experience with WPS/PQR's for welding heavy wall piping (NPS 2"-14,2mm) in material equivalent to API 5L-X52 (St-52.3) to material ASTM A333-6 / A420-WPL6 / A350-LF2 Class 1.
Material group as per ASME B31.3 for X52 is S-1 and for A333-6 it is P-1.
Any other issues to take...
Hi,
Anybody having experience with WPS/PQR's for welding heavy wall piping (NPS 2"-14,2mm) in material equivalent to API 5L-X52 (St.52.3) to material ASTM A333-6 / A420-WPL6 / A350-LF2 Class 1.
Material group as per ASME B31.3 for X52 is S-1 and for A333-6 it is P-1.
Any other issues to take...
Hi,
One of our contractors stated that for a Fire Water (seawater) system Stainless Steel may be specified (316L).
So far, I have never seen Fire Water systems specified in Stainless Steel.
Although the system temperature will not be that high (aprrox. 30 degr.C max), we believe that st.st. is...
Hi,
One of our fabricators intends to supply a piping component machined from AISI-4130/AISI-4140 material which must be welded to TStE 420 piping.
Anybody having experience with welding issues regarding both discimmilar materials?
The Carbon content is different, i.e. 0.28 respectively 0.38...
Hi,
One of our fabricators intends to supply a piping component machined from AISI 4130/AISI 4140 material which must be welded to TStE 420 piping.
Anybody having experience with welding issues regarding both discimmilar materials?
The Carbon content is different, i.e. 0.28 respectively 0.38...
Hi,
Does anybody have maximum allowable pressures at elevated temperatures for Nylon PA 12/G Ball Valve seat materials, or references to reliable graphs/tables?
I know it's also related to the diameter. In our application it's for a NPS 2" Ball Valve.
The charts I already have are generic...
Hi,
Does anybody have maximum allowable pressures at elevated temperatures for Nylon PA 12/G Ball Valve seat materials, or references to reliable graphs/tables?
I know it's also related to the diameter. In our application it's for a NPS 2" valve.
The charts I already have are generic and/or...
Hi,
Does anybody have maximum allowable pressures at elevated temperatures for Nylon PA 12/G Ball Valve seat materials, or references to reliable graphs/tables?
I know it's also related to the diameter. In our application it's for a NPS 2" valve.
The charts I already have are generic and/or...
Hi,
For adding welded support designs to thin wall piping we specify reinforcing pads on the piping before actually welding the supports to it. I do have some reference tables but:
Does anyone have a reference calculation method showing from which Diameter - wall thickness combination these...
Hi,
For adding welded support designs to thin wall piping we specify reinforcing pads on the piping before actually welding the supports to it. I do have some reference tables but:
Does anyone have a reference calculation method showing from which Diameter - wall thickness combination these...
Hi,
For adding welded support designs to thin wall piping we specify reinforcing pads on the piping before actually welding the supports to it. I do have some reference tables but:
Does anyone have a reference calculation method showing from which Diameter - wall thickness combination these...
