Distribution system and clean piping
Summary
In the pharmaceutical plants , some technics processes refer to distribution system .Such as , purified water distribution system , WFI distribution system , transportation and distribution of liquid medicine between vessel etc.
Learning about this system , Watertown supplies design ,manufacture , 
instillation , measure and validation supporting sevice for customers .
To reach special requirements of biological engineering equipment , technics vessel must have good structure complying with requirements of pharmaceutical and sanitation . For piping should consider following contents :
Chemical stability of material ---undissolved , innoxious , stainless steel 304, 316L.
Surface treatment --- mechanical or electro-polishing for the connection surface with media .
Connecion mode --- principal mode is argon protection orbit welding , where is knocked-down ,using sanitation open quick connection .
Appropriate tube diameter --- in fact , the selection of tube diameter is choose of flow .
Slope ---- convenient for vent , depend on itself gravity to drain and avoid appearing low point .
Limit length and diameter ratio at valve point --- to avoid dead leg and prevent microorganisms growing up .
Temperature --- in the range of temperature , can prevent microorganisms growing up effectively . For exampling , as the international method , WFI insulation at above 80?, circulatory insulation at above 65 ? .
Sampling and detection point --- to meet the demands of maintenance and validation after system driving into running , set the on-line detection point and sampling point reasonably .
Insulation --- to prevent scald , frostbite , energy sources saving , consider sea
Insulation --- to prevent scald , frostbite , energy sources saving , consider seal on insulation piping .
Fittings Instillation --- after know about each fitting , install properly.