Oxygen service: the documents to request

Oxygen is the largest single group in ANYI's model record: thirty-nine of the ninety-eight rows in the factory Product Master are recorded under Oxygen and multi-gas service. It is also the group where the gap between a supplier saying the right thing and a supplier being able to show it is widest.

This article is about the second part. It does not tell you what your oxygen installation requires; that is your specification and your regulator's. It tells you what to ask for so that the answers you receive can be checked.

What to request

• Cleanliness evidence, tied to a modelAsk what cleaning process is applied, how it is verified, and to which exact model designations it applies. A statement about a factory is not a statement about the part you are buying.
• Material information for wetted partsAsk which materials are in contact with the gas, including seals. Appearance does not establish this, and a brass body tells you nothing about what is inside it.
• The two connection designations, with orientationAsk for the cylinder-end and outlet designations separately, and for the orientation of each. This is the most common source of a part that arrives correct on paper and wrong on the bench.
• Pressure rating in the recorded unitAsk for the working pressure as the factory recorded it. In ANYI's own oxygen rows those units are mixed: some models are recorded in MPa, one in bar, others in Psi. Ask for the original, not a conversion.
• Scope of any certification namedAsk which models, which standard and which issuing body. A certificate covers a defined scope; the interesting question is whether your model is inside it.

The test to apply to any answer

Notice that every item on that list is a request for something specific to a model designation. That is deliberate. The failure mode in oxygen sourcing is not a supplier who refuses to answer; it is a supplier who answers at the level of the company when you asked at the level of the part, and a buyer who accepts it because the answer sounded confident.

A useful test on any reply you receive: could this sentence be true of the supplier and still not be true of the item on my order line? If it could, the question has not been answered yet.

What we can and cannot tell you

ANYI publishes what the factory record holds and marks the rest as awaiting confirmation. For oxygen models that means working pressures and bores are on the page in the recorded unit, and connection orientation is frequently a row we will confirm against the factory when you name the model. We would rather tell you that than publish a designation we have not checked.

What we will not do is infer suitability from a picture, a family name or a category heading. A model appearing under an oxygen category means the factory record places it there; it is not a clearance for your particular service conditions, and it is not a substitute for the documents above.