RE: LPG Cutting

[Guest guest]

If anybody have statutory guideline or IS code available in this matter ?? Because in every industries most of contractor's using a LPG as cutting cylinder. Please explore this things !!

regards

Devanshu N. Prajapati

Micro Inks Ltd

Vapi

-----Original Message-----From: S Rabiqali Sent: Friday, March 10, 2006 8:50 AMTo: indiansafetyprofessionals ; safetyworld@...; info@...Subject: LPG Cutting

LPG cylinders are normally prohibited for industrial use as an alternative for Acetylene eventhough no law insists (except using domestic, subsidised LPG cylinder) . The following information was received from my friends on the probable reason for prohibiting LPG cylinder.1. High Expansion ratio, (Approx. 250 time in volume) Risk is high,. Expansion ratio is less for Acetylene, comparatively low risk. 2. LPG being heavier than air will settle down in case of leakage posing greater risk of catching fire or even explosion. 3. LPG has very low dispersion rate, which mostly will lead to UVCE kind of explosion 4. LPG cylinders of any size or weight are constructed of thin walled MS sheet making it more vulnerable to heat up easily in case of any spark falling on/over the cylinder. 5. No approved regulators are available in open market except with the cylinder suppliers viz. IOC, BPCL, HPCL. (Remember these companies ask for the regulators when we transfer or surrender the domestic LPG cylinders. This is to avoid unintended usage). 6. Single stage regulator is used in LPG cylinder, In Acetylene you have a key to open cylinder and regulator.7.LPG can get trapped in the cable trays / sumps in floor level More over the calorific value of LPG is approx 1/3 rd of Acetylene. So volume of LPG for the required heat will be thrice and this will increase more handling / storage problems. Hope these are the factors to be considered before using LPG in shop floor. Could any body could throw more light on this? regards, s. rabiq ali

**********Please visit us at www.itcportal.com****************************************************************************************This Communication is for the exclusive use of the intended recipient (s) and shallnot attach any liability on the originator or ITC Ltd./its Subsidiaries/its Group Companies. If you are the addressee, the contents of this email are intended for your use only and it shall not be forwarded to any third party, without first obtaining written authorisation from the originator or ITC Ltd./its Subsidiaries/its Group Companies. It may contain information which is confidential and legally privilegedand the same shall not be used or dealt with by any third party in any manner whatsoever without the specific consent of ITC Ltd./its Subsidiaries/its Group Companies.********************************************************************************

[Guest guest]

Dear All,

In our company we have totally banned LPG cylinders except for canteen use. The reason being as given by Mr. Rabiq Ali exactly.

With regards,

Haricharan

RE: LPG Cutting

If anybody have statutory guideline or IS code available in this matter ?? Because in every industries most of contractor's using a LPG as cutting cylinder. Please explore this things !!

regards

Devanshu N. Prajapati

Micro Inks Ltd

Vapi

-----Original Message-----From: S Rabiqali Sent: Friday, March 10, 2006 8:50 AMTo: indiansafetyprofessionals ; safetyworld@...; info@...Subject: LPG Cutting

LPG cylinders are normally prohibited for industrial use as an alternative for Acetylene eventhough no law insists (except using domestic, subsidised LPG cylinder) . The following information was received from my friends on the probable reason for prohibiting LPG cylinder.1. High Expansion ratio, (Approx. 250 time in volume) Risk is high,. Expansion ratio is less for Acetylene, comparatively low risk. 2. LPG being heavier than air will settle down in case of leakage posing greater risk of catching fire or even explosion. 3. LPG has very low dispersion rate, which mostly will lead to UVCE kind of explosion 4. LPG cylinders of any size or weight are constructed of thin walled MS sheet making it more vulnerable to heat up easily in case of any spark falling on/over the cylinder. 5. No approved regulators are available in open market except with the cylinder suppliers viz. IOC, BPCL, HPCL. (Remember these companies ask for the regulators when we transfer or surrender the domestic LPG cylinders. This is to avoid unintended usage). 6. Single stage regulator is used in LPG cylinder, In Acetylene you have a key to open cylinder and regulator.7.LPG can get trapped in the cable trays / sumps in floor level More over the calorific value of LPG is approx 1/3 rd of Acetylene. So volume of LPG for the required heat will be thrice and this will increase more handling / storage problems. Hope these are the factors to be considered before using LPG in shop floor. Could any body could throw more light on this? regards, s. rabiq ali

**********Please visit us at www.itcportal.com****************************************************************************************This Communication is for the exclusive use of the intended recipient (s) and shallnot attach any liability on the originator or ITC Ltd./its Subsidiaries/its Group Companies. If you are the addressee, the contents of this email are intended for your use only and it shall not be forwarded to any third party, without first obtaining written authorisation from the originator or ITC Ltd./its Subsidiaries/its Group Companies. It may contain information which is confidential and legally privilegedand the same shall not be used or dealt with by any third party in any manner whatsoever without the specific consent of ITC Ltd./its Subsidiaries/its Group Companies.********************************************************************************

[Guest guest]

Dear all,

In our steel manufacturing company, We use LPG for two main reasons as follows.

SEN Preheating: It can be done by LPG, electrical or oil fired. Oil fired preheating is not effective & more over sooth deposition chances are high which we want to avoid. Electrical heating we have not tried. It is complicated also. We found that LPG heating is very effective & fast without any problem.

Bloom cutting: We were using Acetylene gas from 1990 to 2002. But Acetylene gas cutting was not good & cost was very high. With LPG we are saving almost Rs. 6 lakhs per year. Moreover sometimes left over LPG cylinders from SEN preheating we are using for bloom cutting. Because of good cutting & cost effective, it is favorite gas of gas cutters.

However, if any one have other alternative for above application, please write us.

Regards,

Lalit Tiwari

Re: LPG Cutting

Dear All,

In our company we have totally banned LPG cylinders except for canteen use. The reason being as given by Mr. Rabiq Ali exactly.

With regards,

Haricharan

RE: LPG Cutting

If anybody have statutory guideline or IS code available in this matter ?? Because in every industries most of contractor's using a LPG as cutting cylinder. Please explore this things !!

regards

Devanshu N. Prajapati

Micro Inks Ltd

Vapi

-----Original Message-----From: S Rabiqali Sent: Friday, March 10, 2006 8:50 AMTo: indiansafetyprofessionals ; safetyworld@...; info@...Subject: LPG Cutting

LPG cylinders are normally prohibited for industrial use as an alternative for Acetylene eventhough no law insists (except using domestic, subsidised LPG cylinder) . The following information was received from my friends on the probable reason for prohibiting LPG cylinder.1. High Expansion ratio, (Approx. 250 time in volume) Risk is high,. Expansion ratio is less for Acetylene, comparatively low risk. 2. LPG being heavier than air will settle down in case of leakage posing greater risk of catching fire or even explosion. 3. LPG has very low dispersion rate, which mostly will lead to UVCE kind of explosion 4. LPG cylinders of any size or weight are constructed of thin walled MS sheet making it more vulnerable to heat up easily in case of any spark falling on/over the cylinder. 5. No approved regulators are available in open market except with the cylinder suppliers viz. IOC, BPCL, HPCL. (Remember these companies ask for the regulators when we transfer or surrender the domestic LPG cylinders. This is to avoid unintended usage). 6. Single stage regulator is used in LPG cylinder, In Acetylene you have a key to open cylinder and regulator.7.LPG can get trapped in the cable trays / sumps in floor level More over the calorific value of LPG is approx 1/3 rd of Acetylene. So volume of LPG for the required heat will be thrice and this will increase more handling / storage problems. Hope these are the factors to be considered before using LPG in shop floor. Could any body could throw more light on this? regards, s. rabiq ali

**********Please visit us at www.itcportal.com****************************************************************************************This Communication is for the exclusive use of the intended recipient (s) and shallnot attach any liability on the originator or ITC Ltd./its Subsidiaries/its Group Companies. If you are the addressee, the contents of this email are intended for your use only and it shall not be forwarded to any third party, without first obtaining written authorisation from the originator or ITC Ltd./its Subsidiaries/its Group Companies. It may contain information which is confidential and legally privilegedand the same shall not be used or dealt with by any third party in any manner whatsoever without the specific consent of ITC Ltd./its Subsidiaries/its Group Companies.********************************************************************************

[Guest guest]

I would like to add more on this.

Domestic LPg cylinders are not designed for impact load which is

anticipated while handling the materials in the industry such as failling

of a small piece of angle from height.

Regards//SG PATEL

Devanshu

Prajapati

<Devanshu.Prajapa To

ti@...> S Rabiqali ,

Sent by: indiansafetyprofessionals@yahoogrou

indiansafetyprofe ps.com,

ssionals@yahoogro safetyworld@...

ups.com cc

Subject

03/10/2006 09:32 RE: LPG

AM Cutting

If anybody have statutory guideline or IS code available in this matter ??

Because in every industries most of contractor's using a  LPG as cutting

cylinder. Please explore this things !!

regards

Devanshu N. Prajapati

Micro Inks Ltd

Vapi

  LPG Cutting

LPG cylinders are normally prohibited for industrial use as an alternative

for Acetylene eventhough no law  insists (except using domestic,

subsidised LPG cylinder) . The following information was received from my

friends on the probable reason for prohibiting LPG cylinder.

1. High Expansion ratio, (Approx. 250 time in volume) Risk is high,.

Expansion ratio is less for Acetylene, comparatively low risk.

2. LPG being heavier than air will settle down in case of leakage posing

greater risk of catching fire or even explosion.

3. LPG has very low dispersion rate, which mostly will lead to UVCE kind

of explosion

4. LPG cylinders of any size or weight are constructed of thin walled MS

sheet making it more vulnerable to heat up easily in case of any spark

falling on/over the cylinder.

5. No approved regulators are available in open market except with the

cylinder suppliers viz. IOC, BPCL, HPCL. (Remember these companies ask for

the regulators when we transfer or surrender the domestic LPG cylinders.

This is to avoid unintended usage).

6. Single stage regulator is used in LPG cylinder, In Acetylene you have a

key to open cylinder and regulator.

7.LPG can get trapped in the cable trays / sumps in floor level More over

the calorific value of LPG is approx 1/3 rd of Acetylene. So volume of LPG

for the required heat will be thrice and this will increase more handling

/ storage problems.

Hope these are the factors to be considered before using LPG in shop

floor.

Could any body could throw more light on this?

regards,

s. rabiq ali

**********Please visit us at www.itcportal.com**********

***********************************************************************

*******

This Communication is for the exclusive use of the intended recipient

(s) and shall

not attach any liability on the originator or ITC Ltd./its

Subsidiaries/its Group

Companies. If you are the addressee, the contents of this email are

intended for your

use only and it shall not be forwarded to any third party, without

first obtaining

written authorisation from the originator or ITC Ltd./its

Subsidiaries/its Group

Companies. It may contain information which is confidential and

legally privileged

and the same shall not be used or dealt with by any third party in any

manner

whatsoever without the specific consent of ITC Ltd./its

Subsidiaries/its Group

Companies.

***********************************************************************

*********

[Guest guest]

Dear Mr. Rabiq,

There is no rule

[Guest guest]

Dear Mr. Rapiq,

Using LPG gas cylinder for gas cutting

purpose is more safer than Acetylene.

The main reason is Stability. Acetylene

is more unstable and possibility for explosion while handling is very high

than LPG.

As Mr.

Deepak Chanchad mentioned is his mail, L & T has developed a special

ISI approved regulator for LPG cylinders. According to me, using LPG cylinder

with ISI approved regulator and flash back arrester is more safer than

using acetylene gas cylinder for gas cutting operation.

Regards,

R.Sivakumar

[Guest guest]

I fully concur with your statement,

This problem will be solved once LPG for cutting purpose is introduced

by Gas agencies ( I was told that Bharat gas have already introduced)

regards,

S. Rabiq Ali

RS.Sivakumar@...

Sent by: indiansafetyprofessionals

11/03/2006 12:12 PM

To

S Rabiqali

cc

<indiansafetyprofessionals >

Subject

Re:

LPG Cutting

Dear Mr. Rapiq,

Using LPG gas cylinder for gas cutting purpose is more safer than Acetylene.

The main reason is Stability. Acetylene is more unstable and possibility

for explosion while handling is very high than LPG.

As Mr. Deepak Chanchad mentioned

is his mail, L & T has developed a special ISI approved regulator for

LPG cylinders. According to me, using LPG cylinder with ISI approved regulator

and flash back arrester is more safer than using acetylene gas cylinder

for gas cutting operation.

Regards,

R.Sivakumar

[Guest guest]

LPG has some advantages also:

1) Its flammable limits : LEL to UEL is very low (1.9 to 9.5) whereas

Acetylene`s limits are 2.5 to 85. in this case Acetylene requires very

less oxygen as compared to LPG. One of the our old plant faced about one

incident per year in which acytelene cylinder caught fire due to flash

back/back fire.

Chances of flash back /back fire are unlikely in LPG Cutting.

Flash back arrester must be provided.

2) LPG has less calorific value- smooth metal cutting without burning

of metal is possible.

3) Leakage can be easily detected.

4) Thickness of the cylinder is depends upon inner pressure.

We allow our contractor to use commercial LPG for metal cutting.

Please add your views.

S Rabiqali wrote:

LPG cylinders are normally prohibited

for industrial use as an alternative for Acetylene eventhough no law

insists (except using domestic, subsidised LPG cylinder) . The following

information was received from my friends on the probable reason for prohibiting

LPG cylinder.

1. High Expansion ratio, (Approx.

250 time in volume) Risk is high,. Expansion ratio is less for Acetylene,

comparatively low risk.

2. LPG being heavier than air

will settle down in case of leakage posing greater risk of catching fire

or even explosion.

3. LPG has very low dispersion

rate, which mostly will lead to UVCE kind of explosion

4. LPG cylinders of any size or

weight are constructed of thin walled MS sheet making it more vulnerable

to heat up easily in case of any spark falling on/over the cylinder.

5. No approved regulators are

available in open market except with the cylinder suppliers viz. IOC, BPCL,

HPCL. (Remember these companies ask for the regulators when we transfer

or surrender the domestic LPG cylinders. This is to avoid unintended usage).

6. Single stage regulator is used

in LPG cylinder, In Acetylene you have a key to open cylinder and regulator.

7.LPG can get trapped in the cable

trays / sumps in floor level More over the calorific value of LPG is approx

1/3 rd of Acetylene. So volume of LPG for the required heat will be thrice

and this will increase more handling / storage problems.

Hope these are the factors to

be considered before using LPG in shop floor.

Could any body could throw more

light on this?

regards,

s. rabiq ali

**********Please visit us at

www.itcportal.com**********

******************************************************************************

This Communication is for the exclusive use of

the intended recipient (s) and shall

not attach any liability on the originator or

ITC Ltd./its Subsidiaries/its Group

Companies. If you are the addressee, the contents

of this email are intended for your

use only and it shall not be forwarded to any

third party, without first obtaining

written authorisation from the originator or

ITC Ltd./its Subsidiaries/its Group

Companies. It may contain information which is

confidential and legally privileged

and the same shall not be used or dealt with

by any third party in any manner

whatsoever without the specific consent of ITC

Ltd./its Subsidiaries/its Group

Companies.

********************************************************************************

Attachment: vcard [not shown]

[Guest guest]

I am yet to come across for an IS code but when enquired with HSE professionals

of OIL & gas industry, they say it is allowed & we permit. Only reqt is a flash

back arrestor shld be fitted to the cylinder which is available with L & T

Eutectic.

Regds

LPG Cutting

LPG cylinders are normally prohibited for industrial use as an alternative

for Acetylene eventhough no law insists (except using domestic,

subsidised LPG cylinder) . The following information was received from my

friends on the probable reason for prohibiting LPG cylinder.

1. High Expansion ratio, (Approx. 250 time in volume) Risk is high,.

Expansion ratio is less for Acetylene, comparatively low risk.

2. LPG being heavier than air will settle down in case of leakage posing

greater risk of catching fire or even explosion.

3. LPG has very low dispersion rate, which mostly will lead to UVCE kind

of explosion

4. LPG cylinders of any size or weight are constructed of thin walled MS

sheet making it more vulnerable to heat up easily in case of any spark

falling on/over the cylinder.

5. No approved regulators are available in open market except with the

cylinder suppliers viz. IOC, BPCL, HPCL. (Remember these companies ask for

the regulators when we transfer or surrender the domestic LPG cylinders.

This is to avoid unintended usage).

6. Single stage regulator is used in LPG cylinder, In Acetylene you have a

key to open cylinder and regulator.

7.LPG can get trapped in the cable trays / sumps in floor level More over

the calorific value of LPG is approx 1/3 rd of Acetylene. So volume of LPG

for the required heat will be thrice and this will increase more handling

/ storage problems.

Hope these are the factors to be considered before using LPG in shop

floor.

Could any body could throw more light on this?

regards,

s. rabiq ali

**********Please visit us at www.itcportal.com**********

***********************************************************************

*******

This Communication is for the exclusive use of the intended recipient

(s) and shall

not attach any liability on the originator or ITC Ltd./its

Subsidiaries/its Group

Companies. If you are the addressee, the contents of this email are

intended for your

use only and it shall not be forwarded to any third party, without

first obtaining

written authorisation from the originator or ITC Ltd./its

Subsidiaries/its Group

Companies. It may contain information which is confidential and

legally privileged

and the same shall not be used or dealt with by any third party in any

manner

whatsoever without the specific consent of ITC Ltd./its

Subsidiaries/its Group

Companies.

***********************************************************************

*********

[Guest guest]

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