WELCOME Safety Symposium & Exposition 2018, Kolkata SAFETY IN - - PowerPoint PPT Presentation

SAFETY IN OXYFUEL PROCESS

SOUMEN DEB 9TH AUGUST 2018

WELCOME Safety Symposium & Exposition 2018, Kolkata

SAFETY & SECURITY

Safety In Oxyfuel process like Gas welding cutting Brazing Heating

Oxyfuel Heating process

LPG & O2 CYLINDER BLAST HIMANSHU ENGINEERING WORKS YAMUNA NAGAR August 7, 2006

Gases In Use..

Oxygen Acetylene LPG/Propane

Flame Temperatures 2800 to 3100

Gas Density

“Heavy” gases flow like liquids

Explosion Limits

LEL (vol %) UEL (vol %) Acetylene C2H2 2,8 93 Ammonia NH3 15 28 Arsine AsH3 4 10 Butane C4H10 1,8 8,5 Natural Gas (Methan) CH4 5 15 Ethylene Oxyde C2H4O 3 100 Hydrogen H2 4 75,6 Gas

Explosion Limits

 Case Study - Cochin Ship yard

COCHIN SHIPYARD FEB 2018

OXYFUEL GAS FLASHBACK ARRESTORS

 Loud noise caused by

momentary stoppage of gas flow => Resulting in momentary extinguishment and reignition of the flame

 Cause : due to

• bstruction by an
• verheated or

damaged tip

 Burning back of flame into

torch tip or gas hose

 Causes :

 Improper gas press. settings  Distorted or loose tips  Damaged seats  Kinked hoses  Incorrect Nozzle Selection  Clogged or damaged tips  Improper gas supply  Gas Mixing ratio

Bac Backfir kfire Flashbac lashback

OXY-FUEL EQUIPMENT – THE TECHNOLOGY IN FLASHBACK ARRESTORS

FLASHBACK ARRESTOR MODEL “DGN”

Inlet Gas non- Flame arrestor Temperature- filter return valve sensitive cut-off valve

FBA – DGN , ACTUAL CUT VIEW

TYPES OF FLASHBACK ARRESTORS

USES OF 2 PIPE CUTTING TORCHES

FLASHBACK BLAST AT TORCH HANDLE- 2 PIPE TORCH

UNSAFE PRACTICE IN OXYFUEL CUTTING : USES OF 2 PIPE CUTTING TORCH

UNSAFE 2 PIPE TORCH AND VIEW OF FLASHBACK BURST 3 PIPE CUTTING TORCH – THE SAFE ONE

CYLINDERS OUTSIDE THE PLANTS

ACETYLENE GAS BANK WITH ÄSG” SAFETY DEVICE FITTED AT JSPL - RAIPUR

THE TECHNOLOGY :

BU13 – 2X10 OXYGEN GAS BANK @ JSPL RAIPUR WITH SAFETY INSTRUCTION BOARDS

NITROGEN MANIFOLD HEADER ECONOMICAL WITH TORNADO 300 & F11 FILTER

HOWDEN SOLYVENT

TAPPING POINT REGULATORS – ET65 WITH BALL VALVE & SS BACK UP PLATE

THE GREY-MATTER TECHNOLOGY Application Usage

Training Ownership Monitoring Awareness & Assessment

Thank you