# WILD MUSTANG MIDSTREAM LLC — Integrity Assurance Notification

- **operation:** document
- **citation:** PHMSA 25-357159
- **title:** WILD MUSTANG MIDSTREAM LLC — Integrity Assurance Notification
- **source type:** inspection
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2025-11-05
- **effective on:** 2025-11-05
- **summary:** GAS GATHERING in WY; COMPOSITE MATERIALS TYPE C; PHMSA status: RESOLVED.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-357159-operator-41076.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-357159-operator-41076.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-leading-ian-25-357159-operator-41076
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/data_statistics/pipeline/SRCR_and_Integrity_Assurance_Notifications.zip
**body:**

Wild Mustang Midstream LLC PHMSA OPID # 41076 is providing this notification under 49 C.F.R. § 192.9(h) of its intent to use composite pipe material manufactured by FlexSteel USA, Inc. (FlexSteel) in a Type C onshore gas gathering line in the STATE OF WYOMING. Operators have previously submitted notifications under § 192.9(h) to use FlexSteel pipe in at least five (5) other Type C onshore gas gathering lines. As recently as 2025, the Pipeline and Hazardous Materials Safety Administration (PHMSA) issued letters informing these operators that it had no objection to those notifications, provided they implemented supplemental procedures for the use of composite pipe.
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- **body characters:** 671