diff --git a/scripts/prepare_sector_network.py b/scripts/prepare_sector_network.py
index 42def055..03cba48b 100755
--- a/scripts/prepare_sector_network.py
+++ b/scripts/prepare_sector_network.py
@@ -1319,22 +1319,6 @@ def add_storage_and_grids(n, costs):
             n, "H2 pipeline ", carriers=["DC", "gas pipeline"]
         )
 
-        h2_pipes["p_nom"] = 0.0
-
-        if snakemake.input.get("custom_h2_pipelines"):
-            fn = snakemake.input.custom_h2_pipelines
-            custom_pipes = pd.read_csv(fn, index_col=0)
-
-            h2_pipes = pd.concat([h2_pipes, custom_pipes])
-
-            # drop duplicates according to buses (order can be different) and keep pipe with highest p_nom
-            h2_pipes["buses_sorted"] = h2_pipes[["bus0", "bus1"]].apply(sorted, axis=1)
-            h2_pipes = (
-                h2_pipes.sort_values("p_nom")
-                .drop_duplicates(subset=["buses_sorted"], keep="last")
-                .drop(columns="buses_sorted")
-            )
-
         # TODO Add efficiency losses
         n.madd(
             "Link",
@@ -1343,7 +1327,6 @@ def add_storage_and_grids(n, costs):
             bus1=h2_pipes.bus1.values + " H2",
             p_min_pu=-1,
             p_nom_extendable=True,
-            p_nom_min=h2_pipes.p_nom.values,
             length=h2_pipes.length.values,
             capital_cost=costs.at["H2 (g) pipeline", "fixed"] * h2_pipes.length.values,
             carrier="H2 pipeline",