Category D Fittings
| Bellows and Flexible metal hose up to 14″ dia | Flex-Pression Limited |
| Corrurgated and Braided Hose up to 30″ dia | Connectall Ltee |
| Expansion Joints | A.R. Thomson Group |
| Expansion Joints | Dinatecnica Industria E Comercio Ltda. |
| Expansion Joints and Flexible Hose up to 48″ dia | Thorburn Equipment Inc. |
| Expansion Joints and hoses up to 18″ dia | Senior Flexonics Canada |
| Expansion Joints up to 24″ dia | Hyspan Precision Products, Inc. |
| Expansion Joints, Bellows and Flexibile Hoses | American Boa |
| Flexible Hose | Irp Industrial Rubber Ltd. |
| Flexible Hose up to 12″ dia | Us Hose Corp. |
| Flexible Hoses up to 1/2″ dia | Swagelok Company |
| Flexible Metal Hose up to 12″ dia | Hose Master Inc. |
| Slip Joints | Adsco Manufacturing Llc. |
| Slip-Joints up to 24″ dia | Advanced Thermal Systems Inc. |
| Various Hoses up to 2″ dia | Parker Hannifin Canada |
| Various Hoses up to 3″ dia | Cramer Decker Inustries |