0001604665 2026-04-20 2026-04-20 false 0001604665 8-K 2026-04-20 Westlake Chemical Partners LP DE 001-36567 32-0436529 2801 Post Oak Boulevard Suite 600 Houston TX 77056 (713) 585-2900 false false false false Common units representing limited partner interests WLKP NYSE false