BUYER SUPPORT / FIRST ORDER
Compare factory quotes on the same rubber coupling line
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Same-basis request
Turn a 2 inch rubber coupling search into one request several factories can quote on the same line. Two inch is a size field, not a stocked SKU. Rubber Coupling Sourcing issues the list; factories remain responsible for ratings and commercial terms.
Discuss Sample NeedsSix application cards below are buyer jobs. They do not promise a sealed joint or an installed line. US local construction and repair sit outside this service.
Write pipe OD, not only “2 inch”. Ask whether the factory quotes a shielded sleeve or an unshielded sleeve.
Medium and temperature belong on the line. Working pressure in psi is a factory answer, not a site default.
Thread or socket type the supplier must confirm. A drawing callout still needs a written end-type answer.
If one end is 2 inch and the other is not, name both ends. A straight coupling quote is a different line.
FDA 21 CFR 177 or NSF 61 files must name the grade and lot. A company ISO 9001 page is not a substitute.
Ozone and UV change the compound question. EPDM versus NBR is a buyer/factory decision, not this desk’s badge.
Ask the factory to state whether 2 inch is nominal pipe size, sleeve ID, or a catalogue nickname. Record ID and OD in inches or millimetres together.
Thread or socket type must appear on the offer. If the exact 2 inch rubber coupling item is unavailable, the substitution must name the changed end, wall or compound.
Material grade and the applicable ASTM standard stay on the quoted line. If ASTM D2000 is used, the factory writes the callout; this site does not reprint a hardness table as its own.
Treat an equivalent as a new request. Re-issue the changed Shore A, wall, density in g/cc or method so later lots can be compared with the approved item.
Quantity by specification and unit, plus destination packing. A cheaper number on a different Incoterm is a different deal, not a market-beating percentage.
No. This desk sources finished couplings and materials. US local plumbing, trenching and repair are excluded.
See the request checklist for the full writing order.