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  1. Tomg212

    Bolt made from upsetting vs machining

    My industry, Bolting, typically offers few barriers to entry. Anyone with a cell phone and a little basic knowledge of the industry language (do you know the difference between a bolt and a nut?) can go into the business of buying and selling fasteners. You don't need an office full of people...
  2. Tomg212

    Bolt made from upsetting vs machining

    mfgenggear I appreciate your viewpoint and I understand that everyone has their own experienced-based opinion. My experience happens to be explicitly in this arena. I've been in the hot-forged, high-integrity, critical-service bolting industry since 1972 ... 49 years. I can't argue with...
  3. Tomg212

    Bolt made from upsetting vs machining

    I originally believed that ISO9001 would be a great solution for ensuring quality of bolt manufacturers, as well. Unfortunately, that's just not the case. Correctly applied and verified through audit, that standard does a great job of determining whether the company has written procedures and...
  4. Tomg212

    Bolt made from upsetting vs machining

    Unfortunately, a significant number of bolt manufacturers are not actually competent to manufacture bolting. This is a serious matter. Any company purchasing critical-service bolting should have his subject matter expert qualify the technical competence of their chosen bolt supplier before any...
  5. Tomg212

    Bolt made from upsetting vs machining

    Forming a larger diameter bolt or screw head through the hot, upset forging method reorients the straight/parallel material grain flow into a radial flow at the head-to-shank juncture. This radial flow vastly enhances the fatigue resistance at that highly stressed area. In any bending load or...
  6. Tomg212

    single point thread rolling

    Many bolt materials work harden when threaded by rolling. In the case of some alloys this could be detrimental to the bolt's life in service. In the case of some very hard materials, such as 718, work harden more than others, and are also very difficult to roll in one pass. This is especially...
  7. Tomg212

    API 20E BSL-3

    Are you buying heat treated, threaded rod to cut into studs? If so, you aren't a manufacturer, so you can't certify to 20E. Product must be manufactured to meet the spec, not inspected to meet. That won't work. How is the heat treatment done? Furnace loading requirements must be met...
  8. Tomg212

    API 20E BSL-3

    Before you buy your ingot cast steel, you must perform an on-site quality/technical audit of the producing mill.
  9. Tomg212

    Question regarding API Spec 20E (Old thread809-333222)

    thread809-333222 The aforementioned thread questioned the need for the recently published API Specification 20E, "Alloy and Carbon Steel Bolting for use in the Petroleum and Natural Gas Industries." The contributor questioned the need for the new specification, noting that ASTM standards for...

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