diff --git a/code/__DEFINES/misc.dm b/code/__DEFINES/misc.dm
index 5e90129310a..8ab11394446 100644
--- a/code/__DEFINES/misc.dm
+++ b/code/__DEFINES/misc.dm
@@ -452,6 +452,6 @@ GLOBAL_LIST_INIT(pda_styles, list(MONO, VT, ORBITRON, SHARE))
 #define VOMIT_PURPLE 2
 
 //chem grenades defines
-#define EMPTY 1
-#define WIRED 2
-#define READY 3
+#define GRENADE_EMPTY 1
+#define GRENADE_WIRED 2
+#define GRENADE_READY 3
diff --git a/code/datums/wires/explosive.dm b/code/datums/wires/explosive.dm
index 4562bdaf74a..38f1ef16327 100644
--- a/code/datums/wires/explosive.dm
+++ b/code/datums/wires/explosive.dm
@@ -22,7 +22,7 @@
 
 /datum/wires/explosive/chem_grenade/interactable(mob/user)
 	var/obj/item/grenade/chem_grenade/G = holder
-	if(G.stage == WIRED)
+	if(G.stage == GRENADE_WIRED)
 		return TRUE
 
 /datum/wires/explosive/chem_grenade/attach_assembly(color, obj/item/assembly/S)
@@ -119,4 +119,4 @@
 
 /datum/wires/explosive/gibtonite/explode()
 	var/obj/item/twohanded/required/gibtonite/P = holder
-	P.GibtoniteReaction(null, 2)
\ No newline at end of file
+	P.GibtoniteReaction(null, 2)
diff --git a/code/game/objects/items/grenades/chem_grenade.dm b/code/game/objects/items/grenades/chem_grenade.dm
index 606d7a3c8ec..30804393113 100644
--- a/code/game/objects/items/grenades/chem_grenade.dm
+++ b/code/game/objects/items/grenades/chem_grenade.dm
@@ -5,7 +5,7 @@
 	item_state = "flashbang"
 	w_class = WEIGHT_CLASS_SMALL
 	force = 2
-	var/stage = EMPTY
+	var/stage = GRENADE_EMPTY
 	var/list/obj/item/reagent_containers/glass/beakers = list()
 	var/list/allowed_containers = list(/obj/item/reagent_containers/glass/beaker, /obj/item/reagent_containers/glass/bottle)
 	var/list/banned_containers = list(/obj/item/reagent_containers/glass/beaker/bluespace) //Containers to exclude from specific grenade subtypes
@@ -27,7 +27,7 @@
 	wires = new /datum/wires/explosive/chem_grenade(src)
 
 /obj/item/grenade/chem_grenade/examine(mob/user)
-	display_timer = (stage == READY)	//show/hide the timer based on assembly state
+	display_timer = (stage == GRENADE_READY)	//show/hide the timer based on assembly state
 	..()
 	if(user.can_see_reagents())
 		if(beakers.len)
@@ -39,7 +39,7 @@
 				to_chat(user, "<span class='notice'>You detect no second beaker in the grenade.</span>")
 		else
 			to_chat(user, "<span class='notice'>You scan the grenade, but detect nothing.</span>")
-	else if(stage != READY && beakers.len)
+	else if(stage != GRENADE_READY && beakers.len)
 		if(beakers.len == 2 && beakers[1].name == beakers[2].name)
 			to_chat(user, "<span class='notice'>You see two [beakers[1].name]s inside the grenade.</span>")
 		else
@@ -47,23 +47,23 @@
 				to_chat(user, "<span class='notice'>You see a [G.name] inside the grenade.</span>")
 
 /obj/item/grenade/chem_grenade/attack_self(mob/user)
-	if(stage == READY && !active)
+	if(stage == GRENADE_READY && !active)
 		..()
-	if(stage == WIRED)
+	if(stage == GRENADE_WIRED)
 		wires.interact(user)
 
 /obj/item/grenade/chem_grenade/attackby(obj/item/I, mob/user, params)
-	if(istype(I,/obj/item/assembly) && stage == WIRED)
+	if(istype(I,/obj/item/assembly) && stage == GRENADE_WIRED)
 		wires.interact(user)
 	if(I.tool_behaviour == TOOL_SCREWDRIVER)
-		if(stage == WIRED)
+		if(stage == GRENADE_WIRED)
 			if(beakers.len)
-				stage_change(READY)
+				stage_change(GRENADE_READY)
 				to_chat(user, "<span class='notice'>You lock the [initial(name)] assembly.</span>")
 				I.play_tool_sound(src, 25)
 			else
 				to_chat(user, "<span class='warning'>You need to add at least one beaker before locking the [initial(name)] assembly!</span>")
-		else if(stage == READY)
+		else if(stage == GRENADE_READY)
 			det_time = det_time == 50 ? 30 : 50 //toggle between 30 and 50
 			if(landminemode)
 				landminemode.time = det_time * 0.1	//overwrites the proxy sensor activation timer
@@ -72,7 +72,7 @@
 		else
 			to_chat(user, "<span class='warning'>You need to add a wire!</span>")
 		return
-	else if(stage == WIRED && is_type_in_list(I, allowed_containers))
+	else if(stage == GRENADE_WIRED && is_type_in_list(I, allowed_containers))
 		. = TRUE //no afterattack
 		if(is_type_in_list(I, banned_containers))
 			to_chat(user, "<span class='warning'>[src] is too small to fit [I]!</span>") // this one hits home huh anon?
@@ -91,21 +91,21 @@
 			else
 				to_chat(user, "<span class='warning'>[I] is empty!</span>")
 
-	else if(stage == EMPTY && istype(I, /obj/item/stack/cable_coil))
+	else if(stage == GRENADE_EMPTY && istype(I, /obj/item/stack/cable_coil))
 		var/obj/item/stack/cable_coil/C = I
 		if (C.use(1))
 			det_time = 50 // In case the cable_coil was removed and readded.
-			stage_change(WIRED)
+			stage_change(GRENADE_WIRED)
 			to_chat(user, "<span class='notice'>You rig the [initial(name)] assembly.</span>")
 		else
 			to_chat(user, "<span class='warning'>You need one length of coil to wire the assembly!</span>")
 			return
 
-	else if(stage == READY && I.tool_behaviour == TOOL_WIRECUTTER && !active)
-		stage_change(WIRED)
+	else if(stage == GRENADE_READY && I.tool_behaviour == TOOL_WIRECUTTER && !active)
+		stage_change(GRENADE_WIRED)
 		to_chat(user, "<span class='notice'>You unlock the [initial(name)] assembly.</span>")
 
-	else if(stage == WIRED && I.tool_behaviour == TOOL_WRENCH)
+	else if(stage == GRENADE_WIRED && I.tool_behaviour == TOOL_WRENCH)
 		if(beakers.len)
 			for(var/obj/O in beakers)
 				O.forceMove(drop_location())
@@ -118,7 +118,7 @@
 			wires.detach_assembly(wires.get_wire(1))
 			return
 		new /obj/item/stack/cable_coil(get_turf(src),1)
-		stage_change(EMPTY)
+		stage_change(GRENADE_EMPTY)
 		to_chat(user, "<span class='notice'>You remove the activation mechanism from the [initial(name)] assembly.</span>")
 	else
 		return ..()
@@ -126,15 +126,15 @@
 /obj/item/grenade/chem_grenade/proc/stage_change(N)
 	if(N)
 		stage = N
-	if(stage == EMPTY)
+	if(stage == GRENADE_EMPTY)
 		name = "[initial(name)] casing"
 		desc = "A do it yourself [initial(name)]! [initial(casedesc)]"
 		icon_state = initial(icon_state)
-	else if(stage == WIRED)
+	else if(stage == GRENADE_WIRED)
 		name = "unsecured [initial(name)]"
 		desc = "An unsecured [initial(name)] assembly."
 		icon_state = "[initial(icon_state)]_ass"
-	else if(stage == READY)
+	else if(stage == GRENADE_READY)
 		name = initial(name)
 		desc = initial(desc)
 		icon_state = "[initial(icon_state)]_locked"
@@ -175,7 +175,7 @@
 	addtimer(CALLBACK(src, .proc/prime), isnull(delayoverride)? det_time : delayoverride)
 
 /obj/item/grenade/chem_grenade/prime()
-	if(stage != READY)
+	if(stage != GRENADE_READY)
 		return
 
 	var/list/datum/reagents/reactants = list()
@@ -190,7 +190,7 @@
 			for(var/obj/O in beakers)
 				O.forceMove(drop_location())
 			beakers = list()
-		stage_change(EMPTY)
+		stage_change(GRENADE_EMPTY)
 		active = FALSE
 		return
 //	logs from custom assemblies priming are handled by the wire component
@@ -213,7 +213,7 @@
 	threatscale = 1.1	// 10% more effective.
 
 /obj/item/grenade/chem_grenade/large/prime()
-	if(stage != READY)
+	if(stage != GRENADE_READY)
 		return
 
 	for(var/obj/item/slime_extract/S in beakers)
@@ -238,7 +238,7 @@
 	//if you do that it must have reagents.  If you're going to
 	//make a special case you might as well do it explicitly. -Sayu
 /obj/item/grenade/chem_grenade/large/attackby(obj/item/I, mob/user, params)
-	if(istype(I, /obj/item/slime_extract) && stage == WIRED)
+	if(istype(I, /obj/item/slime_extract) && stage == GRENADE_WIRED)
 		if(!user.transferItemToLoc(I, src))
 			return
 		to_chat(user, "<span class='notice'>You add [I] to the [initial(name)] assembly.</span>")
@@ -280,7 +280,7 @@
 	..()
 
 /obj/item/grenade/chem_grenade/adv_release/prime()
-	if(stage != READY)
+	if(stage != GRENADE_READY)
 		return
 
 	var/total_volume = 0
@@ -310,7 +310,7 @@
 /obj/item/grenade/chem_grenade/metalfoam
 	name = "metal foam grenade"
 	desc = "Used for emergency sealing of hull breaches."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/metalfoam/Initialize()
 	. = ..()
@@ -328,7 +328,7 @@
 /obj/item/grenade/chem_grenade/smart_metal_foam
 	name = "smart metal foam grenade"
 	desc = "Used for emergency sealing of hull breaches, while keeping areas accessible."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/smart_metal_foam/Initialize()
 	. = ..()
@@ -346,7 +346,7 @@
 /obj/item/grenade/chem_grenade/incendiary
 	name = "incendiary grenade"
 	desc = "Used for clearing rooms of living things."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/incendiary/Initialize()
 	. = ..()
@@ -364,7 +364,7 @@
 /obj/item/grenade/chem_grenade/antiweed
 	name = "weedkiller grenade"
 	desc = "Used for purging large areas of invasive plant species. Contents under pressure. Do not directly inhale contents."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/antiweed/Initialize()
 	. = ..()
@@ -383,7 +383,7 @@
 /obj/item/grenade/chem_grenade/cleaner
 	name = "cleaner grenade"
 	desc = "BLAM!-brand foaming space cleaner. In a special applicator for rapid cleaning of wide areas."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/cleaner/Initialize()
 	. = ..()
@@ -401,7 +401,7 @@
 /obj/item/grenade/chem_grenade/ez_clean
 	name = "cleaner grenade"
 	desc = "Waffle Co.-brand foaming space cleaner. In a special applicator for rapid cleaning of wide areas."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/ez_clean/Initialize()
 	. = ..()
@@ -420,7 +420,7 @@
 /obj/item/grenade/chem_grenade/teargas
 	name = "teargas grenade"
 	desc = "Used for nonlethal riot control. Contents under pressure. Do not directly inhale contents."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/teargas/Initialize()
 	. = ..()
@@ -439,7 +439,7 @@
 /obj/item/grenade/chem_grenade/facid
 	name = "acid grenade"
 	desc = "Used for melting armoured opponents."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/facid/Initialize()
 	. = ..()
@@ -459,7 +459,7 @@
 /obj/item/grenade/chem_grenade/colorful
 	name = "colorful grenade"
 	desc = "Used for wide scale painting projects."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/colorful/Initialize()
 	. = ..()
@@ -477,7 +477,7 @@
 /obj/item/grenade/chem_grenade/glitter
 	name = "generic glitter grenade"
 	desc = "You shouldn't see this description."
-	stage = READY
+	stage = GRENADE_READY
 	var/glitter_type = /datum/reagent/glitter
 
 /obj/item/grenade/chem_grenade/glitter/Initialize()
@@ -511,7 +511,7 @@
 /obj/item/grenade/chem_grenade/clf3
 	name = "clf3 grenade"
 	desc = "BURN!-brand foaming clf3. In a special applicator for rapid purging of wide areas."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/clf3/Initialize()
 	. = ..()
@@ -529,7 +529,7 @@
 /obj/item/grenade/chem_grenade/bioterrorfoam
 	name = "Bio terror foam grenade"
 	desc = "Tiger Cooperative chemical foam grenade. Causes temporary irration, blindness, confusion, mutism, and mutations to carbon based life forms. Contains additional spore toxin."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/bioterrorfoam/Initialize()
 	. = ..()
@@ -549,7 +549,7 @@
 /obj/item/grenade/chem_grenade/tuberculosis
 	name = "Fungal tuberculosis grenade"
 	desc = "WARNING: GRENADE WILL RELEASE DEADLY SPORES CONTAINING ACTIVE AGENTS. SEAL SUIT AND AIRFLOW BEFORE USE."
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/tuberculosis/Initialize()
 	. = ..()
@@ -569,7 +569,7 @@
 	name = "holy hand grenade"
 	desc = "A vessel of concentrated religious might."
 	icon_state = "holy_grenade"
-	stage = READY
+	stage = GRENADE_READY
 
 /obj/item/grenade/chem_grenade/holy/Initialize()
 	. = ..()
@@ -580,4 +580,4 @@
 	B2.reagents.add_reagent(/datum/reagent/water/holywater, 100)
 
 	beakers += B1
-	beakers += B2
\ No newline at end of file
+	beakers += B2
diff --git a/code/modules/admin/verbs/beakerpanel.dm b/code/modules/admin/verbs/beakerpanel.dm
index 77427b0ba07..104a55d67de 100644
--- a/code/modules/admin/verbs/beakerpanel.dm
+++ b/code/modules/admin/verbs/beakerpanel.dm
@@ -27,7 +27,7 @@
 			for (var/i in 1 to 2)
 				grenade.beakers += beaker_panel_create_container(containersdata[i], grenade)
 				reagent_string += " ([grenade.beakers[i].name] [i] : " + pretty_string_from_reagent_list(grenade.beakers[i].reagents.reagent_list) + ");"
-			grenade.stage_change(3) // ready stage
+			grenade.stage_change(GRENADE_READY)
 			var/grenadedata = json_decode(href_list["grenadedata"])
 			switch (href_list["grenadetype"])
 				if ("normal") // Regular cable coil-timed grenade
diff --git a/code/modules/antagonists/hivemind/vessel.dm b/code/modules/antagonists/hivemind/vessel.dm
index 9fbd61280c8..b94c44c1fa5 100644
--- a/code/modules/antagonists/hivemind/vessel.dm
+++ b/code/modules/antagonists/hivemind/vessel.dm
@@ -77,14 +77,14 @@
 /datum/antagonist/hivevessel/farewell()
 	to_chat(owner, "<span class='assimilator'>Your mind closes up once more...</span>")
 	to_chat(owner, "<big><span class='warning'><b>You feel the weight of your objectives disappear! You no longer have to obey them.</b></span></big>")
-	
+
 /datum/antagonist/hivevessel/roundend_report()
 	if(!owner)
 		CRASH("antagonist datum without owner")
-		
+
 	if(one_mind)
 		return printplayer(owner)
-	
+
 	var/list/report = list()
 	report += printplayer(owner)
 	if(objectives.len)
diff --git a/code/modules/atmospherics/machinery/portable/canister.dm b/code/modules/atmospherics/machinery/portable/canister.dm
index ca4adf5f3fb..9ddd9db7ebd 100644
--- a/code/modules/atmospherics/machinery/portable/canister.dm
+++ b/code/modules/atmospherics/machinery/portable/canister.dm
@@ -217,13 +217,13 @@
 	air_contents.gases[/datum/gas/oxygen][MOLES] = (O2STANDARD * maximum_pressure * filled) * air_contents.volume / (R_IDEAL_GAS_EQUATION * air_contents.temperature)
 	air_contents.gases[/datum/gas/nitrogen][MOLES] = (N2STANDARD * maximum_pressure * filled) * air_contents.volume / (R_IDEAL_GAS_EQUATION * air_contents.temperature)
 
-#define HOLDING		(1<<0)
-#define CONNECTED	(1<<1)
-#define EMPTY		(1<<2)
-#define LOW			(1<<3)
-#define MEDIUM		(1<<4)
-#define FULL		(1<<5)
-#define DANGER		(1<<6)
+#define CANISTER_UPDATE_HOLDING		(1<<0)
+#define CANISTER_UPDATE_CONNECTED	(1<<1)
+#define CANISTER_UPDATE_EMPTY		(1<<2)
+#define CANISTER_UPDATE_LOW			(1<<3)
+#define CANISTER_UPDATE_MEDIUM		(1<<4)
+#define CANISTER_UPDATE_FULL		(1<<5)
+#define CANISTER_UPDATE_DANGER		(1<<6)
 /obj/machinery/portable_atmospherics/canister/update_icon()
 	if(stat & BROKEN)
 		cut_overlays()
@@ -234,44 +234,44 @@
 	update = 0
 
 	if(holding)
-		update |= HOLDING
+		update |= CANISTER_UPDATE_HOLDING
 	if(connected_port)
-		update |= CONNECTED
+		update |= CANISTER_UPDATE_CONNECTED
 	var/pressure = air_contents.return_pressure()
 	if(pressure < 10)
-		update |= EMPTY
+		update |= CANISTER_UPDATE_EMPTY
 	else if(pressure < 5 * ONE_ATMOSPHERE)
-		update |= LOW
+		update |= CANISTER_UPDATE_LOW
 	else if(pressure < 10 * ONE_ATMOSPHERE)
-		update |= MEDIUM
+		update |= CANISTER_UPDATE_MEDIUM
 	else if(pressure < 40 * ONE_ATMOSPHERE)
-		update |= FULL
+		update |= CANISTER_UPDATE_FULL
 	else
-		update |= DANGER
+		update |= CANISTER_UPDATE_DANGER
 
 	if(update == last_update)
 		return
 
 	cut_overlays()
-	if(update & HOLDING)
+	if(update & CANISTER_UPDATE_HOLDING)
 		add_overlay("can-open")
-	if(update & CONNECTED)
+	if(update & CANISTER_UPDATE_CONNECTED)
 		add_overlay("can-connector")
-	if(update & LOW)
+	if(update & CANISTER_UPDATE_LOW)
 		add_overlay("can-o0")
-	else if(update & MEDIUM)
+	else if(update & CANISTER_UPDATE_MEDIUM)
 		add_overlay("can-o1")
-	else if(update & FULL)
+	else if(update & CANISTER_UPDATE_FULL)
 		add_overlay("can-o2")
-	else if(update & DANGER)
+	else if(update & CANISTER_UPDATE_DANGER)
 		add_overlay("can-o3")
-#undef HOLDING
-#undef CONNECTED
-#undef EMPTY
-#undef LOW
-#undef MEDIUM
-#undef FULL
-#undef DANGER
+#undef CANISTER_UPDATE_HOLDING
+#undef CANISTER_UPDATE_CONNECTED
+#undef CANISTER_UPDATE_EMPTY
+#undef CANISTER_UPDATE_LOW
+#undef CANISTER_UPDATE_MEDIUM
+#undef CANISTER_UPDATE_FULL
+#undef CANISTER_UPDATE_DANGER
 
 /obj/machinery/portable_atmospherics/canister/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	if(exposed_temperature > temperature_resistance)