CWS Gases Cranston Welding Supply has been providing services to thousands of customers in SouthEastern New England for 60 years. CWS Gases carries a complete line of arc welding equipment, plasma cutters, gas welding and cutting equipment from the nation's leading manufacturers. CWS also supplies medical and specialty gas apparatus. Even custom blends of specialty gases are are standard to CWS Gases. Whether your business is electronics, laser cutting, emissions, or environmental, we have the right mix for your process.