LPG drain system
LPG drain system
(OP)
My issued is the following.
I got the following configuration. see athachment
Is a lpg installation. spherical tank.
I want to know what are the specifications of this valve and according what standart apply to this valve.
These valves are threaded at both ends?
or welded, according what standard.
Please I need your help.
Thanks for your knowlegde.
I got the following configuration. see athachment
Is a lpg installation. spherical tank.
I want to know what are the specifications of this valve and according what standart apply to this valve.
These valves are threaded at both ends?
or welded, according what standard.
Please I need your help.
Thanks for your knowlegde.





RE: LPG drain system
Piping design code?
Piping material?
Min Max Temperature?
Max Pressure?
Pipe Size?
Where is this drain going?
RE: LPG drain system
What are you trying to do?
Mike Halloran
Pembroke Pines, FL, USA
RE: LPG drain system
A333 GR.6
1 INCH DIAMETER
THIS CONNECTION IS A DRAINAGE OF THIS SPHERICAL TANK HOW I SHOW IN THE IMAGE PRESENTED BEFORE.
LPG SPERICAL TANK
DESING PRESSURE 264.7 PSIA
DESING TEMPERATURE 51.7 CELCIUS
RE: LPG drain system
RE: LPG drain system
"Guide to Good Industry Practices for Bulk LP Gas Installations".
Section 5.3 talks about drains.
I have no idea if your AHJ invokes wlpga or other standards.
Mike Halloran
Pembroke Pines, FL, USA
RE: LPG drain system
RE: LPG drain system
http://www.slideshare.net/mohitnayal98/the-mexico-...
Before we answer any more questions ....... Tell us where this tank farm will be located ???
MJCronin
Sr. Process Engineer
RE: LPG drain system
You say upper design temp of the sphere is 52degC; what about lower design temp? How was lower design temp estimated?
RE: LPG drain system
RE: LPG drain system
I was reading API 2510, someone told me about that standard
8.2.2 Piping Joints
8.2.2.1 The number of joints of any type between the vessel
and the Þrst block valve shall be minimized.
8.2.2.2 Welded joints shall be used where practical.
8.2.2.3 The number of ßanged joints shall be minimized.
8.2.2.4 Joints in pipe NPS 2 or larger shall be welded or
ßanged.
8.2.2.5 Joints in pipe smaller than NPS 2 shall be socketwelded,
butt-welded, or ßanged.
8.2.2.6 Piping gaskets shall be of the self-centering or con-
Þned type and shall be resistant to LPG.
8.2.2.7 Threaded connections shall be minmized to the
extent practicable and shall be between NPS 3/4 and NPS
11/2, inclusive.
Note: Threaded connections are typically used for connections such
as instrumentation and specialty devices and are downstream of a
block valve.
what do you think about this?
the first valve is a plug valve LF2 and the second one is gate valve LCB.
the minimum temperature is -20 celcius
RE: LPG drain system
Welding appears to comply with the API.
Two valves would be OK, since you would probably want to use the plug valve when attempting to regulate flow whenever the gate valve is open.
RE: LPG drain system