Hardened pipes are expensive, and it requires some know-how to make them. However, they come with strong resistances and are ideal for use at the front-line. If biters or spitters always destroy the pipes that supply your flamethrower or water turrets, you should consider replacing them with hardened pipes!
"Sniper and shotgun Turrets, Uranium shotgun ammo, a Sniper Gun, and more to come …" Sometimes, less is more! This mod adds options to "Combat by Samuel" that enable you to reduce range, damage modifier, maximum health, and resistances of sniper and shotgun turrets. This mod now includes the (updated) code from "Combat by Samuel" so you can continue playing with sniper turrets etc. in Factorio 0.18. I will revert this change once "Combat by Samuel" has been updated!