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Precision Gages

Here's a Handy Review of the ANPT L-3 Plug Gage

Introduction ANPT plug gages are used for gaging internal ANPT threads. The process involves screwing up the plug gage by hand into the internal thread of the pipe or product at hand. In comparison to other gages of the ANPT thread family, the ANPT L3 plug gage is used to check the threads that will be engaged once the product is tightened with a wrench for practical application. Besides the ANPT L3 plug gage, there are: ANPT L1 thread plug gage which is used to check the engagement of the thread elements when the product will be tightened by hand, and ANPT 6-step plain plug that is used for checking the minor diameter of the female fitting. More On ANPT L3 Plug Gage The process for gaging the internal thread of a product involves not just ANPT L3 plug gage, but all three gages mentioned above. First off, the thread is gaged with ANPT L3 plug gage, also called the limit-type L1 taper thread plug gage. The gaging notch that most nearly represents the size of the thread is noted. Although the ANPT threads are similar to NPT threads, the difference in the application for aeronautical purposes dictates that they must be controlled very carefully for taper, thread form, and diameter. This is because up until the length of 2-inch size, the ANPT and NPT threads are almost identical and have a requirement of an L1 gage. From the primary L1 threads that are measured with the L1 gage, the threads thereafter are referred to as the “L3 length” which is measured by the ANPT L3 plug gage. These are the threads that will be engaged when the threads of the product are tightened with a wrench. ANPT L3 plug gage is also a limit type gage whose total length equals L1 + L3. But despite this, the gage only has four threads at the small end. This is why, for a thread to be accepted on the L3 gage, the position of the gaging notch must coincide with half turn of the position previously noted on the L1 gage. The ANPT threads have a distinctive design to make a true seal that eliminates the need for a sealant. They make a true seal by crushing in on themselves. The ANPT L1 and ANPT L3 threads are needed for measurements of the female threads. Together, L1 and ANPT L3 plug gages measure the:  Lead Taper Pitch diameter, and Major diameter For measuring the minor diameter of the internal thread, the amount of the truncation is noted. Since the pitch diameter and truncation vary with limits, the minor diameter will also. The three-pitch diameter gaging positions are: Basic Minimum Maximum These pitch diameters necessitate 3 pairs of maximum and minimum truncation steps that amount to a total of 6 positions. Conclusion: At WESTport, we provide you with quality that you can trust. We are manufacturers who are ISO 9001 and ISO/IEC 17025 accredited which means each of our products complies with the strictest industrial standards. Ranging from the plain and threaded plug and ring gages to any custom needed gage to your blueprint specifications, WESTport is your one-stop-shop for all your quality assurance needs. We are committed to providing premium quality products in a timely manner with our industry guarantee to beat any competitor's price. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Here's an Overview of the ANPT L-2 Ring Gage

Introduction ANPT L2 ring gage is the second ring gage that is used for the measurement of the external rings on components like fittings, pipes, plugs, etc. Before this, ANPT L1 ring gage is used which is for the purpose of determining the thread elements that are engaged when the component is Hand tightened. In contrast to that, the ANPT L2 ring gage is used to engage the thread elements that will be engaged when the component is wrench tightened How To Use It? ANPT L2 ring gages are used in conjunction with L1 rings as well as with the 6-step ring. However, L1 and 6 step rings are more commonly used in conjunction in contrast to ANPT L2 ring gage. The L2 gage measures the effective external threads that are situated beyond the L1 distance. The application of both, L1 and L2 gages are similar to a major degree with a difference in the count of the number of turns that the product travels or fails to travel, in case the piping of the component is determined to be faulty. More On ANPT L-2 Ring Gage ANPT or the Aeronautical National Piper Thread rings are different from the NPT or the NPTF thread rings, given that they are for aeronautical applications. The do not require the use of any sealants as the threads form an airtight mechanical seal that prevents any sort of leakage. This is why they are called “dry seal” threads. Although the ANPT threads are similar to NPT threads, the difference in the application for aeronautical purposes dictates that they must be controlled very carefully for taper, thread form, and diameter. This is because up until the length of 2-inch size, the ANPT and NPT threads are almost identical and have a requirement of an L1 gage. The ANPT L2 ring gage is for measuring the second half of the threads that are engaged when the component is wrench tightened After both, the L1 and L2 lengths have been checked, the ANPT 6-step ring is used which helps to measure the major and minor diameter of the threads of the part in use. ANPT threads are measured in the same fashion as NPTF threads, both internally and externally (we use the ANPT L-1 ring for external measurement). But the gages are still dimensionally different which is why they cannot be used interchangeably. From the basic number of turns specified for the ANPT L-2 ring, a turn of 1 ½ from the basic turn is still acceptable for the L2 ring gage.  Conclusion WESTport Taper pipe ANPT L2 Ring Gage is available in a variety of styles and over a wide range of measurements. WESTport stands proud as an ISO 17025  manufacturer of quality assurance products with a commitment to client satisfaction and the provision of reliable products as an industry leader. Production units with regular and excessive use of Taper Pipe NPTF L3 Plug Gage are advised to have several spares at hand along with a master thread plug to regularly check on the wear and tear of their ANPT L2 Plug Gage. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Here's a Quick Review of the ANPT L-1 Plug Gage

Introduction: ANPT L-1 Plug Gage is used to check the internal thread rings of the aeronautical equipment such as pipes, fittings, plugs, etc. ANPT or Aeronautical National Form Pipe Taper Thread Plug Gages are used in applications where gasket, straight threads, or O-rings are not applicable; particularly in aeronautical applications. More About ANPT L-1 Plug Gage: ANPT L-1 Plug Gage is used to first gauge the internal threads. The gaging notch that most accurately represents the size of the thread is hence taken a note of. It is used to check the major diameter, pitch diameter, lead, and taper. The major diameter is only measured to the upper threads which are hand-tied. The later threads, which are measured by ANPT L-3 Plug Gage are measured for wrench tight position. The parts checked with ANPT L-1 Plug Gage are considered acceptable when they come flush with the notch. This means they will come close to either plus one or minus one turn and check the first four screw threads. Similar to NPTF, ANPT threads also employ an L1 and an L3 gage to measure the first four and the last three thread rings. Likewise, they both require plain taper 6-Step Crest-Check pipe plug gauges. The L-1 gage, more particularly, the ANPT L-1 Plug Gage is first used to gauge the size of the hole in contrast to the screw thread tolerance which could be either basic, minimum, or maximum. Albeit the ANPT internal pipe threads are practically the same as the pipe threads of NPT, they have a distinct application for their use in aeronautical applications which is why their diameter, taper, and thread form are very carefully controlled to form a seal that doesn’t need application of external sealants. These sealed threaded joints are also needed in applications where O-rings, gaskets, or straight threads won’t get the job done. Similar to ANPT L1 plug gage which checks the external diameter, the ANPT ring gages are used for checking the external diameter of pipes and ends with rings. The plug has a distinct difference from the basic NPT plug where in addition to its basic steps, we have the maximum and minimum steps that are used for measurement as follows: The product is in tolerance if its face is between the maximum and minimum steps of the plug. To check the depth beyond L1 depth which is measured with ANPT L1 plug gage, the ANPT L3 plug gage is used. Furthermore, the truncation is checked with a six-step plain taper plug gage which includes maximum and minimum truncation steps for each of the three-pitch diameter conditions which are maximum, minimum, and basic. It is also noteworthy that there should be no shake or wobble during the measurement. This is an indicator of taper error and must be tended to on an immediate basis. Conclusion: At WESTport Corporation, we have been providing the industry worldwide with precision measuring instruments and calibration services since 1989. WESTport employs state-of-the-art measures to ensure all our products comply with the ISO 9001, and ISO/IEC 17025 standards. Moreover, our expanded product line includes thread and plain gages, API Plug and Ring Gages, taps and dies, medical gages, spline gages, and full-service metrology laboratories for tool calibration, repair, and onsite services. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

An Overview of NPTF L-1 Ring Gages

Introduction:NPTF L1 ring gages inspect the hand-tight engagement or the functional size of a part in question. This includes the male threads or the nipple that must conform to specific calculations before being deemed usable. NPTF L-1 RIngs are designed to conform to the ANSI/ASME B1.20.5 standards. Gaging the NPTF external threads requires using more equipment so it confirms the standards stated. Screw thread pipe ring gages have two basic classes which includes plain and threaded. NPTF Rings L-1 belongs to the latter. The gage is threaded onto the pipe or equipment to be measured via hand. More About NPTF Rings L-1:NPTF is also called “Dryseal” because the thread tolerance is controlled very strictly. Still, the gages are used in a similar manner to plug gages except for the difference in the thread, which is internal in the case of pipe plugs and external in the case of rings. NPTF Rings L-1 is also called “thin” gage and parts that are measured on it are considered tolerable when they come flush to the ring’s end to a positive or negative one turn of the unmarked side, effective measuring the first 4 or 5 threads. For the further threads, NPTF L-2 ring gage is used which measures from the fifth to seventh threads. About NPTF Threads:NPTF threads are measured in the same fashion as ANTP threads both internally and externally (we use the NPTF L-1 ring for external measurement). But the gages are still dimensionally different which is why they cannot be used interchangeably. From the basic number of turns specified for the NPTF L-1 Ring, a turn of 1 ½ from the basic turn is still acceptable for the L2 ring gage. Both NPT and NPTF have the same taper per inch, as well as threads per inch, the real difference lies in diameters (major and minor) along with the crest and the root of the threads. The threads of both, NPT and NPTF are designed differently, with the NPTF threads being designed to have a smaller range than NPT threads and interfere with the mating thread. This in turn creates a dry mechanical seal that prevents leakage without the use of a sealant. This happens because the NPTF threads are designed to have interference at the root and crest of the threads not just minor, but also on the major diameter. This results in a leak-proof connection.Conclusion:NPTF L-1 Ring Gages from WESTport Corporation are ideal for measuring the external threads of pipes and/or other equipment and ensuring the said equipment or part in question falls within the said parameters. Using state-of-the-art technology and excellent customer service, we are thoroughly committed to ensuring we retain our status as one of the major quality assurance products and services. WESTport has been servicing industry worldwide since 1989 and is an ISO 9001 and ISO 17025 accredited manufacturer of quality assurance products. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Here's an Overview of Our NPTF L-2 Ring Gages

Introduction:NPTF L-2 Ring Rages are used in conjunction with NPTF L-1 Rings, where it is used to inspect the wrench engagement threads of a coupling and the taper of the external threads. They are manufactured as per the ANSI/ASME B1.20.5 standard. WESTport provides a free certfificate traceable to NIST with each ring gage. L2 rings are also called the thick ring and that is used to check the thread element of those threads that have been engaged when tightened with a wrench. They are used in conjunction with the NPFT L1 gages and ensure dimensional compliance of the rings of the equipment or part in question. How They Are Used:The NPTF L-2 Rings are used as a check on taper where its engagement in the L-1 and L-2 dryseal must be within “One and a half” turn of the difference between the basic turn engagement of the ring gages. Basically, you are using the NPTF external ring gages in a similar fashion to pipe plug gages. The only difference is the measurement of the external gage instead of the internal. NPTF L-2 Rings are not just for the second half, but also the required half for the measurement of the fifth, sixth, and seventh threads. The L2 in the name is a representation of the dimension in the thread specification that coincides with the “Wrench Tight Engagement Length”.After the use of NPTF L-2 Ring Gage, a final check involves the use of a plain tapered ring gage, which is also called the NPTF 6 Step which helps in the measurement of the major diameter of the external thread of the part in question. More on NPTF 6 Step Rings:NPTF, along with ANPT (Aeronautical National Pipe Taper) external threads are first graded with NPTF L-1 Ring Gage for the measurement of the first five rings. The gage is hand tightened and the parts being checked are considered acceptable when they come flush to the end of the ring to plus or minus one turn of the unmarked side. The L-1 ring is also called the thin ring which is followed by the thick or the L-2 ring for checking the approximation of the rings or threads from fifth to seventh. With special emphasis on thread tolerance, the 6-step ring is used in the end.Similar to the L1 ring, the L2 ring is also used as per the count of the number of turns that determine the distance traveled by the ring over the object in question. L-1 and NPTF L-2 Rings together inspect the lead, taper, pitch and minor diameter. The face of the rings should not vary more than ½ turn to the relative position of the small end of the pipe and the basic gaging with the use of both L-1 and NPTF L-2. Conclusion:At WESTport Corporation, we have been providing industry world-wide with precision measuring instruments and calibration services since 1989. WESTport employs state-of-the-art measures to ensure all our products comply with the ISO 9001, and ISO/IEC 17025 standards. Moreover, our expanded product line includes (but is not limited to): Thread and Plain Gages API Plug and Ring Gages Taps and Dies Medical Gages Spline Gages Full-service Metrology Laboratories for tool calibration, repair, and onsite services Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

What You Should Know About Our NPTF 6 Step Ring Gages

Introduction:NPTF 6 Step Ring Gages are used in conjunction with an L1 gage to measure the pitch diameter of a part. The part in question may belong to aeronautical or dry seal parts depending upon its use and application. The use of NPTF 6 Step Rings ensure confirmation of the requirements of the Dryseal while it, itself conforms to the ANSI B22 Standards.More on NPTF 6 Step Rings:As the name states, each NPTF 6 Step Ring Gage is divided into 6 different steps which include: B BT MNT MN MXT MX The crest of the NPTF Ring 6 Step is used for inspecting the truncation limits and the taper of the major diameter. The steps or notches aforementioned are in relation to the position where the L1 gage is measured (may also include L3 or L2). If a part falls in the minimum range, it must measure between MN and MNT, similarly, if it falls between the basic range, it must measure between the B and BT range. Finally, if it falls in the maximum range, then it must fall between MX and MXT. Besides NPTF, it is also used to measure ANPT for the root-check gage of the threads of the products in measurement. How To Use:The three steps (B, MN, MNT) represent the minimum truncation for the basic minimum and maximum thread sizes whereas the other three (BT, MX, and MXT) represent the corresponding maximum truncation. They are used in a fashion similar to the 6 step plain plug, with the only difference being that the ring is always used with an L1 ring gage where the ring is used to confirm whether the thread crest is within the defined specifications.Difference Between NPT and NPTF:It is still noteworthy that there is a major difference between the thread design of NPT and NPTF, which is why they both have different requirements spelled out in separate ANSI codes. For National Pipe Taper or NPT threads, their requirements are expressed in ANSI B1.20.1 whereas, for National Pipe Taper Fuel or NPTF, the requirements are expressed in B1.20.3.What sets both NPT and NPTF apart is the root and crest of their threads along with their major/minor diameters. Besides that, you will find that both NPT and NPTF have the same pitch diameters, taper-per-inch, and even threads-per-inch. So it seems that the NPTF crest lies right where the parameter requirements of NPT lie, with the only difference being a minor range of thread crest. This is why NPTF requires more assembly and consideration in comparison to NPT. Moreover, the thread roots are also different. They create a mechanical seal when they are tied with the crest of NPTF mating thread at the assembly by deforming, hence earning them the name, dryseal. NPTF 6 Step Rings ensure closer control and confirmation of the necessary standards to form a satisfactory dry seal. Their essential application is to confirm the three zones of the gage overlapping. Conclusion:At WESTport, we provide you with quality that you can trust. We are manufacturers who are ISO 6506, ISO 9001 and ISO/IEC 17025 accredited which means each of our products complies with the strictest industrial standards. Ranging from plain and threaded plug and ring gages to any custom need gage to your blueprint specifications, WESTport is your one stop shop for all your quality assurance needs. We are committed in providing premium quality products in a timely manner with our industry guarantee to beat any competitors price. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Overview of Taper Pipe NPT L1 Ring Gages

IntroductionTaper pipe NPT L1 Ring gage essentially inspects the hand tight engagement or the functional size of male threads, pipes, or nipples. They have a tolerance of +/- one turn from the small end face of the ring. All NPT gages are made to ANSI/ASME B1.20.1 standards. It is used for measuring the external taper threads where it is screwed onto the threads of the product in question by hand. The thread is considered within the permissible tolerance when the working rings gaging face is at either + or – one turns from being flushed. More About Taper Pipe NPT L1 Ring GageTaper Pipe NPT L1 Ring Gage comes in two basic styles of screw; Plain Taper and Threaded Taper. We only require the L1 ring gage for the measurement of NPT threaded parts. When it is used, the ring is screwed onto the part from the side of the ring that is marked. It is also called thin ring gage as it only checks the first four to five threads. The L1 also specifies the Hand Tight Engagement Length which refers to the dimension in the thread specification. The Taper Pipe NPT L1 Ring Gage is meant to be used for general-purpose applications or pipe threads that are to be sealed with sealants or Teflon tape. Furthermore, NPT Threads do not require L2 or L3 checks. They are made in accordance with ANSI/ASME B1.20.1 standard. Taper pipe NPT L1 Ring gage is available in two types similar to the L1 plug gage; Go and No-Go thread ring gages. By means of application, they are very easy to use and are meant to be used by hand. In comparison to L1, the tolerance of NPTF thread is much more closely monitored. However, the purpose of the gages for both the standards remains the same. It ensures correct major diameter class of fit and TPI/Pitch along with special pitch diameters. At WESTport, we ensure that each threaded ring gage is designed as per the AGD (American Gage Design). Each ring undergoes stringent inspection to ensure it has been precision hand lapped to provide optimum finish and superior accuracy. The final inspection of each Taper Pipe NPT L1 Ring Gage is completed in an environmentally controlled ISO 17025 laboratory. PrecautionsIt is worth noticing that despite being manufactured with the highest standards, the Taper pipe NPT L1 Ring gage is still a precision tool which is why it needs the utmost care similar to any other tool of such nature. It is used by technicians, engineers, machinists, and Quality Assurance inspectors to ensure a part is made as per defined criteria. Given that it is a hand-operated tool, it is vital that it must be used with caution and diligence. WESTport Taper pipe NPT L1 Ring gage is an effective and easy-to-use tool that has markings for easy identification and is available in a variety of metric sizes. It is a highly accurate and a reliable tool that ensures fast and easy testing. ConclusionWESTport Taper pipe NPT L1 Ring gages comes with a Free NIST certificate of accuracy. With each product, you also avail yourself of the free technical support from our highly qualified engineers that have a collective experience of over 100 years. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Overview of Taper Pipe NPTF 6 Step Plug Gages

Introduction Taper pipe NPTF 6 step plug gage is used in conjunction with L1 plug to inspect the profile of the internal threads or crest truncation. In other words, its purpose is to measure the pitch diameter size of the essential components of the dry seal. It ensures conformance to dry seal requirements because to get an accurate measurement, it is vital to determine the distance from the L1 gage to the part. More About Taper Pipe NPTF 6 Step Plug Gage The 6-steps plug gage is used for testing the root or crest of the product thread in question. Since the three zones of the gage are overlapping, we need six steps for measurement. These six steps are as follows: MX MXT B BT MN MNT How Does It Work? If the result of the L1 gage indicates that a part falls in the minimum range, then it must fall between B and BT on the Taper pipe NPTF 6 step plug gage. If the part lies in the basic range, then it must fall between B and BT on the Taper pipe NPTF 6 step plug gage. Finally, if a part lies in the maximum range, it must fall between MX and MXT on the Taper pipe NPTF 6 step plug gage. Taper pipe NPTF 6 step plug gage is required by the NPTF class 2 threads. It is also known by another name which is Crest-and-Root Truncation Gage. Taper pipe NPTF 6 step plug gage is not threaded, rather, it has six steps grounded into it. The tool is used by inserting it into the hole and then reading the pairs which tell us the high and low limits of the three aforementioned conditions. This extra check is required by the class 2 threads. These gages are designed to the specifications of the Bureau of Standards Handbook H-28 and ANSI Standards B1.20.3 and comply with MIL-P-7105 Military Standards. Conclusion Taper pipe NPTF 6 step plug gage is essential for the measurement of the Crest-and-Root Truncation. Having no threads of its own, it has 6 steps that help in the identification of the thread in either minimum, basic, or maximum condition. They help us in gaging the internal diameter of holes that have been drilled into parts or machines. They are an essential tool for every quality control agent, engineer, machinist, or inspector to get an idea of the characteristics of the part in question. These measuring methodologies are essential and prevent the employment of difficult methodologies for measurement that may be more time consuming or simply not implementable for everyone. Based on that, a part is either accepted or rejected. At WESTport we offer a wide range of the highest quality precision tools, taps and dies, gages, and full-service ISO 17025 metrology laboratories for tool calibration, repair and onsite services. We are continuously improving our services and products to maintain our position as a global leader in our industry. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Taper Pipe NPTF L3 Plug Gage Overview

Introduction Taper Pipe NPTF L3 Plug Gage is used for the inspection of the L-3 length of the engagement for taper and wrench tight. What makes NPTF gages different from NPT gages is that they are considered dry seal pipe threads. They are also called relationship gages which are used for inspecting the taper coupling and wrench engagement of the internal threads or couplings. Taper Pipe NPTF L3 Plug Gage is used in conjunction with NPTF L1 gages hence the name “relationship gage”. Use When internal threads are gaged, Taper Pipe NPTF L3 Plug Gage is one of the three main members used where the Taper Pipe NPTF L3 Plug Gage is used to checking the threads that will be engaged at the stage of wrench tightening. Since the gages are different in terms of dimension, it is vital that they must not be interchanged from one another. NPTF vs. NPT The primary difference is in the name, then there is a major difference of no sticking medium used like Teflon tape or pipe dope between the two threads in NPTF. NPTF gages are designed to bear a high critical crest tolerance which is why they are commonly inspected with a smooth 6 step plug or ring gage. The gage is used in conjunction with the NPT L1 gage that helps in establishing the tolerance of the product in question (whether the tolerance is min, nominal, or max.) The L3 in the name of Taper Pipe NPTF L3 Plug Gage refers to the need for a secondary inspection which may be required on the said threads for which the L3 plug is used. Do note that the plug is used for the inspection of the internal threads whereas ring gages are used for the inspection of external threads. Both L1 and L3 plugs are used on threads that are not plated. As such, it is imperative that the gage must not move 0.5 turns (+/-) from the position of the L1 gage. Gages that are plated have a different tolerance. Precautions It is vital that the Taper Pipe NPTF L3 Plug Gage must be treated with diligence as a precision tool as any type of mishandling or misuse, or forced use can cause unwanted deformities or nicks. This can compromise the integrity of the gage hence the measurements. Also, the gage must never be forced into a part that is under check. Moreover, keep the gage separate and never cram it with other tools as it may damage the threads of the gage. When you are done with the use of the tool, it is advised that you should oil or grease the tool to protect it from rust. Finally, if Taper Pipe NPTF L3 Plug Gage is to be shipped over long distances, store it in a separate container with insulation to prevent it from being damaged. Conclusion Taper Pipe NPTF L3 Plug Gage is a part of class 2 gages that are used specifically for measuring the crest and threads. The plugs themselves can only be checked with a master thread plug which is why it is advised to keep a spare. Production units with regular and excessive use of Taper Pipe NPTF L3 Plug Gage are advised to have several spares at hand along with a master thread plug to regularly check on wear and tear of their Taper Pipe NPTF L3 Plug Gage. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited.

Taper pipe NPTF L1 Plug Gage Overview

Introduction The Taper pipe NPTF L1 plug Gage, also called relationship gage are considered dry-seal pipe threads. Essentially, Taper pipe NPTF L1 plug Gage is used for the inspection of the pitch diameter of the hand tightened L1 length of any engagement. The NPTF part stands for “National Pipe Taper Fuel” where their requirements are spelled out in ANSI B1.20.3. NPTF vs. NPT Comparatively speaking, both, the Taper pipe NPTF L1 plug Gage and the NPT version will have identical taper-per-inch, threads-per-inch, and pitch diameter. What is different is their crest and roots of threads as well as their major and minor diameters. Though NPTF threads crest is well within the required parameters of NPT, they still have a smaller range in comparison. Where NPT threads are considered general-purpose pipe threads, NPTFs are reserved for more critical applications. In a sense, both are designed to screw together and that much is simple enough, but where NPT requires a “seal” to be truly leak-proof, NPTF doesn’t. Both NPT and NPTF standards are strikingly different in terms of threads as even the L1 gage requirements both have a difference of ½ in. size-wise. They are not interchangeable which is where the Taper pipe NPTF L1 plug Gage comes into play. The NPTF threads require more assembly for size check which is not possible with the NPF plug gage. Only a Taper pipe NPTF L1 plug Gage can check NPTF threads. More About Taper Pipe NPTF L1 Plug Gage Taper pipe NPTF L1 plug Gages are specifically designed for inspecting the functional thread and pitch diameter for the components with internal threads. The L1 indicates that Taper pipe NPTF L1 plug Gage belongs to class 1 thread gages for a functional check of taper deviations and continuation of thread beyond the L1 length of engagement. Being an L1 plug, the Taper pipe NPTF L1 plug Gage inspects the hand tight engagement of an internal thread or couplings as well as the functional size. At WESTport, all Taper pipe NPTF L1 plug Gages are manufactured as per ANSI/ASME B1.20.5 and come along with a Free NIST certificate of accuracy. They are designed with hardened steel or similar materials which prevent the degradation of the threads. Moreover, these gages are designed with recessed minor thread diameter for safe functionality. The ergonomic handle provides a maximum comfortable grip. Due to the reduced thread start diameter design, it ensures easy insertion of the gage. Conclusion The Taper pipe NPTF L1 plug Gages have tolerance of one turn (+/-) from either the small end face of the ring or notch on the plug and it falls between one of the following sets of notches: MN & MNt B & Bt MX & MXt The notches are in relation to from where L1 gets measured. At WESTport, you can expect to buy top quality Taper pipe NPTF L1 plug Gages with quality you can trust. With an extended line of products pertaining to Quality Assurance Products and Services, we are at the forefront of serving the industry as leaders in precision tools and related services. Written by WESTport Corporation. All rights reserved. Any reproduction is strictly prohibited. The Taper pipe NPTF L1 plug Gage, also called relationship gage are considered dry-seal pipe threads. Essentially, Taper pipe NPTF L1 plug Gage is used for the inspection of the pitch diameter of the hand tightened L1 length of any engagement. The NPTF part stands for “National Pipe Taper Fuel” where their requirements are spelled out in ANSI B1.20.3.

3 Ways Your Thread Gages Can Sustain Damage

Threaded fasteners play a vital role in the construction of a wide range of products. Without accurate thread sizing, a fastener's ability to provide a secure connection is compromised. Manufacturers rely on thread gages to check fastener specifications and ensure the integrity of all threaded fasteners leaving their facility. Your thread gages are designed to be durable, but they may sustain some damage over time. If you know how thread gages can sustain damage, you will be equipped to identify faulty thread gages before they create serious problems in the future. 1. Abrasions One of the most common ways that a thread gage can sustain damage is through contact with the fasteners it is measuring. A fastener is either threaded through or into the thread gage. The threading process can create friction that causes abrasions to form on the interior surface of the thread gage. Abrasions have the potential to alter the profile of the thread gage, making it impossible to produce an accurate reading when using the damaged thread gage to take measurements. Be sure that you inspect your thread gages often for evidence of abrasions and replace damaged gages quickly to preserve the integrity of your fasteners. 2. Expansion Many of the thread gages used in modern manufacturing facilities are made from steel. Steel is a metal alloy that offers great strength and durability, but it does have a tendency to expand over time. The molecules within a steel product can start to relax once the steel is put into use. Environmental factors like temperature and humidity can influence the rate at which steel expands. You want to ensure that you are using your thread gages in a controlled environment. Fasteners should only be tested in temperature-controlled settings, and thread gages must be stored in a temperature-controlled space to prevent any damage caused by expansion. 3. Burrs The dimensions of a thread gage must be exact if you want to ensure that your fasteners meet strict design specifications. Anytime one metal product comes into contact with another, it's possible for burrs to form. Burrs are the result of contaminants that have cut their way into the surface of your thread gages. A burr can make it impossible to obtain an accurate measurement using your thread gage, and this could result in a decline in fastener quality. Inspect all thread gages used in your facility often to ensure burrs don't cause threaded fastener problems in the future. To learn more about thread gages or to replace your worn-out ones, contact a supplier.

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