Specialised industrial hose for welding and construction Truco's specialised industrial hose for welding and construction - our oxygen and acetylene hoses - have been designed for use in highly abrasive welding applications. This hose type is designed to withstand tough underground welding conditions and is abrasion-, UV- and ozone-resistant. It is a combination hose consisting of an oxygen (blue) and an acetylene (red) hose, providing a single solution for all welding and gas applications. The hose features a specialised rubber cover with self-extinguishing properties in order to operate for a long-life under the pressures of sparks and flames associated with welding. The recommended temperature range is -20°C to 90°C. This range is certified ISO:3821 for gas welding equipment. All Truco's industrial hose products are all engineered and manufactured with high quality and high standard rubber polymers and compounds.