Chemical Dosing Lances Statiflo chemical dosing lances are specifically designed to meet the needs of industry. They are custom designed and engineered to maximise efficiency of Statiflo static mixers. They are also available as standalone products for all of your chemical dosing requirements. The Statiflo STL-LP Chemical Dosing Lance in uPVC. The Statiflo STM-HP Chemical Dosing Lance in Stainless Steel. The Statiflo XHP Chemical Dosing Lance.