Guides
Notes written for the people who specify and buy: what the standards actually cover, where one joint beats another, and what to put on a drawing before it reaches a foundry.
GuideGrooved or welded? Choosing the joint for a fire mainHow grooved mechanical joints compare with welding on fire protection and water mains: install time, movement, coating damage and when each one is the right call.Read →GuideMalleable or ductile? What actually changes in an iron fittingBoth are cast iron and both sit on the same pipe, but one bends where the other cracks. What the two materials mean at the thread, the groove and the galvanising bath.Read →GuideGate, butterfly or OS&Y? Choosing the isolation valve for a fire mainThree valve types do most of the isolation work in a fire system, and the choice is about how the valve is operated and inspected, not only what it costs.Read →GuideWhat “UL Listed” and “FM Approved” actually coverTwo marks get quoted on almost every fire protection datasheet, and they do not mean what most buyers assume. What each one certifies, what it leaves out, and how to check a supplier's claim in two minutes.Read →GuideWhat to send a foundry for an OEM casting quoteMost OEM enquiries come back slow because the drawing is missing one of five things. A short checklist that gets you a real price instead of a question.Read →
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