They're best used with flanges made to API 6A, ANSI B16. Document Information. The final two columns list the recommended wrench and torque size according to the flange bolt diameter and length. The size, diameter, and length are listed on the flange bolt chart. Think about the greatest amount of tensile load the bolt will be able to handle. What's the Difference between a Male and a Female Thread Type? Let's say you need to bolt a flange to a pipe. There is a very specific procedure that is used when torquing the bolts. While a flange bolt chart provides you with the sizes, diameters, and lengths of different bolts. Read on to find out the most critical information you need before settling for a bolt that matches your specifications.
Determine the Flange Bolt Length. This one-stop bolt size and length chart helps you with just that. Is this content inappropriate? It offers: - Mobile friendly web templates.
A stud is threaded either on both ends or the full length of the stud. Naturally, the larger the pipe, the more bolts it requires. The hex size ranges from 3/8" to 3/4" with a length of 1" to 5", while the serrated hex ranges from 1/4" to 1" with a length of 3/8" to 2 1/2" and the 12 point flange bolt ranges from 1/2" to 7" with a length of 1/2" to 7". When it comes to finding quality fasteners, partnering with a company with experts who understand the most critical information is a must. Nominal Pipe Size, abbreviated to NPS, is a set of standard North American sizes for pipes used in high or low temperatures and pressures.
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. 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. 20-inch to 24-inch NPS: 20 bolts. This is achieved when two or more flange bolt threads extend past the nut after being tightened. The NPS is usually engraved into the pipe itself. Raised Face Flanges are typically used in process plant applications. 0% found this document useful (0 votes). No charts or sheets to go through just put the flange size, flange rating and flange type you are looking to assemble hit the wrench Icon an your stud sizes, stud lengths, wrench sizes and recommended torques will appear. Flange bolts come in different types and sizes, and selecting the most appropriate for your next project can be a daunting task. An ideal flange bolt should be long enough to guarantee the thread is in complete contact with the nut. Flange bolts are different, and every company has its own bolting standards regarding lubrication, bolt reuse recommendations, and torque tightening procedures. © © All Rights Reserved.
A quick reference guide for flange assembly, stud sizes, stud lengths, wrench sizes and recommended torque patterns and torques. Standard Flange Bolt Size Chart. Aurora is a multisite WordPress service provided by ITS to the university community. Male threads are situated outside the pipe, like a bolt. Real-Life Flange Bolt Size Chart Application. Bolt holes come in six primary sizes: 5/8-inch, 3/4-inch, 7/8-inch, 1-inch, 1 1/8-inch, and 1 1/4-inch. Share this document. Grade G flange lock nuts are used primarily with hex flange bolts to ensure proper tightening. The number of bolts refers to the actual number of bolts required according to the NPS. Male threads are inserted into the female threads. 3 mm), your NPS is 2. Torque value depends on the present friction between the head of the nut and bolt threads which is affected by thread lubrication. The bolt circle and flange come with their own unique measurements, ranging from 2-1/4 to 29-1/2, and 3-3/8-inch to 32-inch respectively.
Centrally Managed security, updates, and maintenance. For your reference, these are the corresponding number of bolts based on the NPS: - 1/4-inch to 3-inch NPS: 4 bolts. Did you find this document useful? They are commonly used in aircraft to hold the outer casing firmly and in automotive since installation with a 12 point socket is easy. Then, measure the string from the beginning to the end with a ruler and divide the measurement by 3. 1 Posted on July 28, 2022. Here's how to read a flange bolt size chart: Select the Right NPS.
It helps to save you time when you're in the process of choosing the most appropriate fastener for your project. As listed in the chart, use a size 1-1/16 wrench and tighten the flange bolt in 5 ft-lb increments until the final torque value—110—is reached. The threading requirement for bolts depends on the size and length. Share or Embed Document. The guide above provides you with all the measurements required for the job, including the recommended wrench and toque type. Bolt length is divided into two segments: Raised Face Flange (RF) and Ring Type Joint Flange (RTJ). Reading a flange bolt size chart is fairly straightforward. Made for Pipefitters by Pipefitters. Ideally, two full threads should be visible on the nut's topside for a tight grip.
The grooves rest on metal rings that compress whenever the connecting bolts are tightened. An effective flange bolt has a lower yield strength to minimum tensile strength ratio. Buy the Full Version. Phone:||860-486-0654|. Flange bolts are threaded either partially or fully. Studs both have American National Course Threads. In this article, I'll show you how to properly read a flange bolt size chart, as well as identify what size flange bolt you already have. Big Bolt manufactures quality bolts and nuts, with a quick turnaround time to ensure efficiency in your project. Tensile load is calculated by multiplying the tensile strength with the area of the load material. If the pipe is unmarked, you'll have to manually measure the pipe with a string, a ruler, and a calculator. Bolt Holes||Bolt Circle||Flange||Raised Face||Ring Joint|. Of Bolts||Bolt Diameter||Bolt Length||Wrench Size||Recommended Torque (Ft. /Lbs. Original Title: Full description. Length of stud bolts when used with lap joint flanges will depend upon the thickness of the lap joint stub end.
Each kit contains fasteners, nuts, washers and lock washers of the same material as your flange. From the industrial fastening standards, you'll be able to determine if a suggested torque value belongs to dry or lubricated thread. 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. Report this Document. The size guide below lists accurate sizing information about the selected flange's diameter and length, as well as the required wrench size and torque patterns. These are not the only factors needed when selecting a bolt that meets your standards. Flange bolts come in the following flange sizes: - 150 lb. 47 Series A Standards. See this helpful video: Piping basic – NPS, DN, Pipe Schedule. The next set of columns represent the flange bolt diameter and length. The following chart shows the quantity and size of bolts or studs require for a particular flange size and class.
Click to expand document information. 2 Posted on August 12, 2021. 576648e32a3d8b82ca71961b7a986505. They're fairly easy to identify because they're the only type of flange with their gasket surface situated above the bolting circle face, giving them a "raised" appearance. Flange bolts are classified into four types: Hex, 12 Point, Serrated Hex and Metric Flange Bolts. RTJ flanges have deep, high tolerance grooves cut into their faces. RTJ flanges are manufactured to ASME B16. 0% found this document not useful, Mark this document as not useful. A flange bolt is one of two components that is used to hold the flanges together. Insert all four bolts and tighten all the nuts by hand until snug. Before selecting a suitable bolt, it's crucial to consider the manufacturer's recommendations, the industry, and its use case. Always select the correct wrench and torque size to prevent injuries and damage to equipment due to slippage or the application of too much pressure.
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