Added the socket wrench

Large wrench, lets you unwrench pipes of any pressure at the downside of mixing their contents with the environment.

code/ATMOSPHERICS/pipes.dm

@@ -1174,9 +1174,22 @@
 		return 1
 	var/datum/gas_mixture/int_air = return_air()
 	var/datum/gas_mixture/env_air = loc.return_air()
-	if ((int_air.return_pressure()-env_air.return_pressure()) > 2*ONE_ATMOSPHERE)
-		user << "\red You cannot unwrench this [src], it too exerted due to internal pressure."
 	add_fingerprint(user)
+	if ((int_air.return_pressure()-env_air.return_pressure()) > 2*ONE_ATMOSPHERE)
+		if(istype(W, /obj/item/weapon/wrench/socket))
+			user << "<span class='warning'>You begin to open the pressure release valve on the pipe...</span>"
+			if(do_after(user, 50))
+				playsound(get_turf(src), 'sound/machines/hiss.ogg', 50, 1)
+				user.visible_message("[user] vents \the [src].",
+									"You have vented \the [src].",
+									"You hear a ratchet.")
+				var/datum/gas_mixture/transit = new
+				transit = int_air
+				transit.divide(parent.members.len) //we get the total pressure over the number of pipes to find gas per pipe
+				env_air.add(transit) //put it in the air
+				del(transit) //remove the carrier
+		else
+			user << "\red You cannot unwrench this [src], it too exerted due to internal pressure."
 			return 1
 	playsound(get_turf(src), 'sound/items/Ratchet.ogg', 50, 1)
 	user << "\blue You begin to unfasten \the [src]..."
@@ -1184,7 +1197,7 @@
 		user.visible_message( \
 			"[user] unfastens \the [src].", \
 			"\blue You have unfastened \the [src].", \
-			"You hear ratchet.")
+			"You hear a ratchet.")
 		new /obj/item/pipe(loc, make_from=src)
 		for (var/obj/machinery/meter/meter in T)
 			if (meter.target == src)

code/game/objects/items/weapons/tools.dm

@@ -32,6 +32,12 @@
 	origin_tech = "materials=1;engineering=1"
 	attack_verb = list("bashed", "battered", "bludgeoned", "whacked")
 
+//we inherit a lot from wrench, so we change very little
+/obj/item/weapon/wrench/socket
+	name = "socket wrench"
+	desc = "A wrench intended to be wrenchier than other wrenches. It's the wrenchiest."
+	icon_state = "socket_wrench"
+	w_class = 4.0 //big shit, to balance its power
 
 /*
  * Screwdriver