Looking at the first paragraph: "Industrial valves play a critical role in ensuring the safe operation of processing plants, refineries, and other facilities." Here, "processing plants" might be a candidate. Then "refineries" and "facilities" as well. Each needs three plausible alternatives.
Documentation and marking: The standard requires valve manufacturers to provide documentation and marking that includes information on valve performance, materials, and testing. api 612 pdf free download
Second sentence: "Techstreet: Techstreet, a Thomson Reuters platform, offers a free preview of API 612, and you can also purchase a PDF download of the standard." Looking at the first paragraph: "Industrial valves play
Wait, the user said "don't touch proper nouns." The oil and gas industry here is a general term, not a proper noun, so it's okay to synonymize. So "oil and gas industry" could become "hydrocarbon sector" or "energy field." Hmm, but "hydrocarbon sector" is a bit more specific. Let me check the exact synonyms. Let me check the exact synonyms