There is a very specific procedure that is used when torquing the bolts. Buy the Full Version. They're best used with flanges made to API 6A, ANSI B16. 47 Series A Standards. Click to expand document information. The reason for this is that there needs to be a certain amount of force to hold the flanges together when the internal pressure is high. 3 mm), your NPS is 2. Flange bolts are different, and every company has its own bolting standards regarding lubrication, bolt reuse recommendations, and torque tightening procedures. Share or Embed Document. Weld neck flange has a 1/4 inch raised face. While a flange bolt chart provides you with the sizes, diameters, and lengths of different bolts. A proper flange connection is not complete without a suitable bolt. When it comes to finding quality fasteners, partnering with a company with experts who understand the most critical information is a must. Report this Document.
Save API Flange Bolt Wrenches, Hammer Wrenches for Well... For Later. Grade G flange lock nuts are used primarily with hex flange bolts to ensure proper tightening. While it's tempting to use whatever you have in hand, improper use of flange bolt sizes can cause an array of potentially dangerous accidents and damages. Flange bolts have a ton of important functions, especially in engine and transmission protection, plumbing, and large-scale applications. If your pipe's thread is female, simply measure the inside diameter of the pipe across the opening. Hex flange bolts feature an integrated washer head and are commonly used on motor frames.
First, measure the pipe's NPS. 5/8-inch bolt holes fit 1/4 to 1-1/2-inch NPS, 3/4-inch bolt holes fit 2 to 3-inch NPS, and so on. Raised Face Flanges are typically used in process plant applications. Standard Flange Bolt Size Chart.
Flange bolts are classified into four types: Hex, 12 Point, Serrated Hex and Metric Flange Bolts. Torque value depends on the present friction between the head of the nut and bolt threads which is affected by thread lubrication. 20-inch to 24-inch NPS: 20 bolts. Share on LinkedIn, opens a new window.
Your bolt material should be able to meet your project needs in terms of hardness, yield strength, and chemical composition. If the pipe measures 3 5/8 inches, check the measurements under the 3 NPS classification and gather the materials according to the listed information: |NPS||No. Ideally, two full threads should be visible on the nut's topside for a tight grip. The diameter lists the size of the bolt's holes, circle, and flange, all of which are necessary when selecting the right flange bolt for your project. These are not the only factors needed when selecting a bolt that meets your standards. Contact us today to get quality flange bolts that meet your specifications.
Original Title: Full description. Male threads are inserted into the female threads. 1 Posted on July 28, 2022. Extreme Bolt & Fastener can match the material of your flanges with easy bolting kits. Male threads are situated outside the pipe, like a bolt. From the industrial fastening standards, you'll be able to determine if a suggested torque value belongs to dry or lubricated thread. Then, measure the string from the beginning to the end with a ruler and divide the measurement by 3. To be clear, the NPS listed below refers to the approximate outside diameter (OD) of a pipe rather than its exact figure.