diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index 5e3e493b3d8..2717da14826 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -11,6 +11,7 @@ from frappe.model.document import Document
 from frappe.query_builder import Field
 from frappe.query_builder.functions import Count, IfNull, Max, Min, NullIf, Sum
 from frappe.utils import cint, cstr, flt, get_link_to_form, parse_json
+from frappe.utils.caching import request_cache
 from frappe.website.website_generator import WebsiteGenerator
 
 import erpnext
@@ -1253,17 +1254,10 @@ def _apply_representative_lines(rows, doctype, bom, keys):
 			row[column] = line.get(column)
 
 
+@request_cache
 def _representative_lines(doctype, bom, keys, columns):
 	"""Cached per request: get_bom_items_as_dict recurses through phantom BOMs, and the same
 	sub-BOM is commonly reached more than once."""
-	cache = getattr(frappe.local, "_bom_representative_lines", None)
-	if cache is None:
-		cache = frappe.local._bom_representative_lines = {}
-
-	cache_key = (doctype, bom, keys, columns)
-	if cache_key in cache:
-		return cache[cache_key]
-
 	representative = {}
 	for line in frappe.get_all(
 		doctype,
@@ -1273,7 +1267,6 @@ def _representative_lines(doctype, bom, keys, columns):
 	):
 		representative.setdefault(tuple(line.get(key) for key in keys), line)
 
-	cache[cache_key] = representative
 	return representative
 
 
diff --git a/erpnext/manufacturing/doctype/production_plan/services/bom_explosion.py b/erpnext/manufacturing/doctype/production_plan/services/bom_explosion.py
index 7faea744898..217feb4c814 100644
--- a/erpnext/manufacturing/doctype/production_plan/services/bom_explosion.py
+++ b/erpnext/manufacturing/doctype/production_plan/services/bom_explosion.py
@@ -5,6 +5,7 @@
 
 import frappe
 from frappe.query_builder.functions import Count, IfNull, Max, Min, Sum
+from frappe.utils.caching import request_cache
 
 from erpnext.manufacturing.doctype.production_plan.services.planning_queries import get_uom_conversion_factor
 
@@ -67,16 +68,9 @@ def _apply_representative_lines(rows, doctype, bom_no, keys, include_non_stock_i
 			row.source_warehouse = line.source_warehouse
 
 
+@request_cache
 def _representative_lines(doctype, bom_no, keys, include_non_stock_items):
 	"""Cached per request: the explosion recurses and commonly revisits the same sub-BOM."""
-	cache = getattr(frappe.local, "_bom_explosion_representative_lines", None)
-	if cache is None:
-		cache = frappe.local._bom_explosion_representative_lines = {}
-
-	cache_key = (doctype, bom_no, keys, include_non_stock_items)
-	if cache_key in cache:
-		return cache[cache_key]
-
 	# only BOM Item carries is_phantom_item, and only its query ORs the phantom flag into the stock
 	# filter; the explosion table has neither
 	filters_phantom = doctype == "BOM Item"
@@ -112,7 +106,6 @@ def _representative_lines(doctype, bom_no, keys, include_non_stock_items):
 	for line in lines:
 		representative.setdefault(tuple(line.get(key) for key in keys), line)
 
-	cache[cache_key] = representative
 	return representative
 
 
diff --git a/erpnext/manufacturing/doctype/production_plan/services/sub_assembly_queries.py b/erpnext/manufacturing/doctype/production_plan/services/sub_assembly_queries.py
index 46384786a5e..ec1760976a4 100644
--- a/erpnext/manufacturing/doctype/production_plan/services/sub_assembly_queries.py
+++ b/erpnext/manufacturing/doctype/production_plan/services/sub_assembly_queries.py
@@ -6,6 +6,7 @@
 import frappe
 from frappe.query_builder.functions import Count, IfNull, Max, Sum
 from frappe.utils import flt
+from frappe.utils.caching import request_cache
 
 from erpnext.manufacturing.doctype.bom.bom import get_children as get_bom_children
 from erpnext.manufacturing.doctype.production_plan.services.planning_queries import (
@@ -207,15 +208,9 @@ def _apply_representative_lines(rows, bom_no):
 			row.source_warehouse = line.source_warehouse
 
 
+@request_cache
 def _representative_lines(bom_no, keys):
 	"""Cached per request: sub-assembly resolution recurses and revisits the same BOM."""
-	cache = getattr(frappe.local, "_sub_assembly_representative_lines", None)
-	if cache is None:
-		cache = frappe.local._sub_assembly_representative_lines = {}
-
-	if bom_no in cache:
-		return cache[bom_no]
-
 	representative = {}
 	for line in frappe.get_all(
 		"BOM Item",
@@ -230,7 +225,6 @@ def _representative_lines(bom_no, keys):
 	):
 		representative.setdefault(tuple(line.get(key) for key in keys), line)
 
-	cache[bom_no] = representative
 	return representative