Gas pipe sizing - Bouyancy and Residual Pressures

Duncan Brown — Mon, 13 Mar 2017 12:05:44 GMT

Current Revision posted to Hevacomp Wiki by Duncan Brown on 3/13/2017 12:05:44 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys Gas
	Subarea:	N/A

Overview

The Netsys Gas Pipe sizing program considers Buoyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program. Consider this small Netsys Gas system:

This system will produce the following sizing results:

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Available pressure = Source pressure - Pressure drop in section
Required pressure = Outlet pressure + Section pressure drop - Buoyancy effect
Residual pressure = Available pressure - Required pressure

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers.
This is reflected in the calculation above.

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and Residual Pressures

Duncan Brown — Fri, 18 Nov 2016 17:22:01 GMT

Revision 12 posted to Hevacomp Wiki by Duncan Brown on 11/18/2016 5:22:01 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys Gas
	Subarea:	N/A

Overview

The Netsys Gas Pipe sizing program considers Buoyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program. Consider this small Netsys Gas system:

This system will produce the following sizing results:

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers.
This is reflected in the calculation above.

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and Residual Pressures

Shane Regan — Tue, 27 Sep 2016 15:31:32 GMT

Revision 11 posted to Hevacomp Wiki by Shane Regan on 9/27/2016 3:31:32 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	Netsys Gas
	Subarea:	N/A

Overview

The Netsys Gas Pipe sizing program considers Buoyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program. Consider this small Netsys Gas system:

This system will produce the following sizing results:

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above.

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Shane Regan — Fri, 19 Feb 2016 11:47:09 GMT

Revision 10 posted to Hevacomp Wiki by Shane Regan on 2/19/2016 11:47:09 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	Netsys Gas
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program. Consider this small Netsys Gas system:This system will produce the following sizing results:

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Shane Regan — Fri, 21 Aug 2015 09:57:27 GMT

Revision 9 posted to Hevacomp Wiki by Shane Regan on 8/21/2015 9:57:27 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	Netsys Gas
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Available pressure - Source pressure - Pressure drop in section
Required pressure = Outlet pressure + Section pressure drop - Buoyancy effect
Residual pressure = Available pressure - Required pressure

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Tue, 10 Mar 2015 12:39:41 GMT

Revision 8 posted to Hevacomp Wiki by Duncan Brown on 3/10/2015 12:39:41 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Tue, 02 Dec 2014 14:16:13 GMT

Revision 7 posted to Hevacomp Wiki by Duncan Brown on 12/2/2014 2:16:13 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Tue, 02 Dec 2014 14:15:25 GMT

Revision 6 posted to Hevacomp Wiki by Duncan Brown on 12/2/2014 2:15:25 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Mon, 07 Jul 2014 14:30:35 GMT

Revision 5 posted to Hevacomp Wiki by Duncan Brown on 7/7/2014 2:30:35 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program. Consider this small Netsys Gas system:

This system will produce the following sizing results:

And the Residual Pressures report for the system:

The columns in the above report are calculated with the following methods:

Where the buoyancy effect is calculated using this formula:

The example system above uses Natural Gas with a buoyancy of 0.68

So for Section 3 in our example Gas layout:

The residual pressures report shows figures rounded to whole numbers. This is reflected in the calculation above

Notes

The Netsys Gas program uses the following Gas densities:

Natural Gas	0.68	Town Gas	0.54	Butane	2.48	Propane	1.85
Air	1.22	Carbon Dioxide	1.72	Methane	0.67	Nitrogen	1.16
Nitrous Oxide	1.84	Oxygen	1.33	Exhaust Gasses	1.00

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Mon, 07 Jul 2014 14:14:15 GMT

Revision 4 posted to Hevacomp Wiki by Duncan Brown on 7/7/2014 2:14:15 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

This document explains how the buoyancy effect is considered in the Residual pressure report in the Netsys Gas program.

Consider this small Netsys Gas system:

This will

To see the methodoligy used in the Netsys program, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Elisabeth Pry — Tue, 25 Jun 2013 13:44:11 GMT

Revision 3 posted to Hevacomp Wiki by Elisabeth Pry on 6/25/2013 1:44:11 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	All
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

To see the methodoligy used in the Netsys program, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Gas Bouyancy, SELECTservices, Residual Pressure, Hevacomp Mechanical Designer, TechNote, netsys

Bouyancy and residual pressures

Duncan Brown — Tue, 17 Jul 2012 09:05:41 GMT

Revision 2 posted to Hevacomp Wiki by Duncan Brown on 7/17/2012 9:05:41 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): All

Original Author: Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

To see the methodoligy used in the Netsys program, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Netsys Gas Bouyancy Residual Pressure

Netsys - Bouyancy and residual pressures

Duncan Brown — Mon, 16 Jul 2012 11:16:10 GMT

Revision 1 posted to Hevacomp Wiki by Duncan Brown on 7/16/2012 11:16:10 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): All

Original Author: Bentley Technical Support Group

Overview

The Netsys Gas Pipe sizing program considers Bouyancy and Residual Pressures during the calculation process.

Method

To see the methodoligy used in the Netsys program, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: Netsys Gas Bouyancy Residual Pressure

Gas pipe sizing - Bouyancy and Residual Pressures

Gas pipe sizing - Bouyancy and Residual Pressures

Overview

Method

Notes

Bouyancy and Residual Pressures

Overview

Method

Notes

Bouyancy and Residual Pressures

Overview

Method

Notes

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

Notes

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Overview

Method

See Also

External Links

Comments or Corrections?

Bouyancy and residual pressures

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Netsys - Bouyancy and residual pressures

Document Information

Overview

Method

See Also

External Links