API standards for hand equipment API standards for hand equipment rocketscientist (Chemical) (OP) 29 Jul 13 18:06 I am being asked to write a specification for a hand pump. This will be a crank-driven lobe pump or diaphragm. Does anyone know what API specification applies? RE: API standards for hand equipment micalbrch (Mechanical) 18 Aug 13 04:51 API 676 covers rotary lobe pumps and API 675 diaphragm pumps (with manual stroke control). Both will not really fit to your hand pump but you can at least refer to some chapters of the standards.