Gas Regulator Accessories, Gas Hose Fitting & Torch

https://www.igtchina.com/products/gas-regulator-accessories-hose-torch/

IGT Safety Regulator Accessories
The inside diameter of the hose must be adequate to keep pressure loss a minimum and avoid damage to the hose do to heat generation or excessive turbulence.

When selecting replacement accessories, two areas of temperature must be considered. Fluid temperature and ambient.

Determine where or how the replacement hose or accessories is to be used. To fulfill the requirements of applications.