Tubing & Casing Inspection System Solutions
FYOU PMEC Tubing & Casing Thread Inspection Instruments take the guesswork out of inspecting tubing and casing. FYOU PMEC’s Tubing and Casing Thread Inspection Gages inspect all required thread elements – Thread Form, Ovality, Crest Diameter, Thread Lead, Thread Height, Thread Addendum and Thread Taper – all with the precise accuracy required in API Spec 5B:2017.
Crest Diameter and Ovality Inspection
Crest Diameter Gages measure the internal and external pitch diameters of tapered threaded connections. Any slight variations in diameter or ovality are immediately detected with these precision gages granting you total control over your quality. These versatile gages easily adjust to measure thread diameters ranging from 1½” – 20”. The ability to inspect a range of diameters with one gage, eliminates the need for a room full of ring or plug gages.
Crest Diameter and Ovality Gages
CDG Series gages detects variations in crest diameter by the use of a gage shoe that rests on the crest of the threads. Variation in diameter is detected by the indicator readout. These gages must be set to a nominal size with one of a variety of setting standards. Refer to the standard chart that follows. All of these gages are API approved for use on tubing and casing.
| P/N | Model | Description | Range |
| CDG-0512-Ext | ZJY5-W | External Crest Diameter Gage | External 1-1/2″~5-1/2″ |
| CDG-0512-Int | ZJY5-N | Internal Crest Diameter Gage | Internal 1-1/2″~5-1/2″ |
| CDG-0020-Ext | ZJY20-W | External Crest Diameter Gage | External 2-3/8″~20″ |
| CDG-0020-Int | ZJY20-N | Internal Crest Diameter Gage | Internal 2-3/8″~20″ |
Rod Style Setting Standards for CDG Series Crest Diameter Gage
Rod style setting standards are designed to preset all models of the CDG Series gages for accurate inspection of API
threaded connections. Each set of standards consists of two precision ground rods that are ground to lengths in accordance
with API Specification 5B. All the standard styles and connections are available please refer as below chart.
| Rod Style Setting Standards for CDG Series Crest Diameter Gage | |||
| Thread Type | Connections | PIN Standard Model | Box Standard Model |
| NUE | 2⅜” NUE | CDGR-238NUE-P | CDGR-238NUE-B |
| 2⅞” NUE | CDGR-278NUE-P | CDGR-278NUE-B | |
| 3½” NUE | CDGR-312NUE-P | CDGR-312NUE-B | |
| 4” NUE | CDGR-4NUE-P | CDGR-4NUE-B | |
| 4½” NUE | CDGR-412NUE-P | CDGR-412NUE-B | |
| EUE | 2⅜” EUE | CDGR-238EUE-P | CDGR-238EUE-B |
| 2⅞” EUE | CDGR-278EUE-P | CDGR-278EUE-B | |
| 3½” EUE | CDGR-312EUE-P | CDGR-312EUE-B | |
| 4” EUE | CDGR-4EUE-P | CDGR-4EUE-B | |
| 4½” EUE | CDGR-412EUE-P | CDGR-412EUE-B | |
| Thread Type | Connection | Pin Standard | Box Standard |
| Buttress | 4½” Buttress | CDGR-412B-P | CDGR-412B-B |
| 5” Buttress | CDGR-5B-P | CDGR-5B-B | |
| 5½” Buttress | CDGR-512B-P | CDGR-512B-B | |
| 6⅝” Buttress | CDGR-658B-P | CDGR-658B-B | |
| 7” Buttress | CDGR-7B-P | CDGR-7B-B | |
| 7⅝” Buttress | CDGR-758B-P | CDGR-758B-B | |
| 8⅝” Buttress | CDGR-858B-P | CDGR-858B-B | |
| 9⅝” Buttress | CDGR-958B-P | CDGR-958B-B | |
| 10¾” Buttress | CDGR-1034B-P | CDGR-1034B-B | |
| 11¾” Buttress | CDGR-1134B-P | CDGR-1134B-B | |
| 13⅜” Buttress | CDGR-1338B-P | CDGR-1338B-B | |
| 16” Buttress | CDGR-16B-P | CDGR-16B-B | |
| 18⅝” Buttress | CDGR-1858B-P | CDGR-1858B-B | |
| 20” Buttress | CDGR-20B-P | CDGR-20B-B | |
| LTC | 4½” 8R LTC | CDGR-412L-P | CDGR-412L-B |
| 5” 8R LTC | CDGR-5L-P | CDGR-5L-B | |
| 5½” 8R LTC | CDGR-512L-P | CDGR-512L-B | |
| 6⅝” 8R LTC | CDGR-658L-P | CDGR-658L-B | |
| 7” 8R LTC | CDGR-7L-P | CDGR-7L-B | |
| 7⅝” 8R LTC | CDGR-758L-P | CDGR-758L-B | |
| 8⅝” 8R LTC | CDGR-858L-P | CDGR-858L-B | |
| 9⅝” 8R LTC | CDGR-958L-P | CDGR-958L-B>P110 or CDGR-958L-B<P110 | |
| 20” 8R LTC | CDGR-20L-P | CDGR-20L-B>JK55 or CDGR-20L-B<JK55 | |
| Thread Type | Connection | Pin Standard | Box Standard |
| STC | 4½” – 9.50# 8R STC | CDGR-412S-9-P | CDGR-412S-9-B |
| 4½” – Other 8R STC | CDGR-412S-O-P | CDGR-412S-O-B | |
| 5” – 11.50# 8R STC | CDGR-5S-11-P | CDGR-5S-11-B | |
| 5” – Other 8R STC | CDGR-5S-O-P | CDGR-5S-O-B | |
| 5½” 8R STC | CDGR-512S-P | CDGR-512S-B | |
| 6⅝” 8R STC | CDGR-658S-P | CDGR-658S-B | |
| 7” – 17.00# 8R STC | CDGR-7S-17-P | CDGR-7S-17-B | |
| 7” – Other 8R STC | CDGR-7S-O-P | CDGR-7S-O-B | |
| 7⅝” 8R STC | CDGR-758S-P | CDGR-758S-B | |
| 8⅝” – 24.00# 8R STC | CDGR-858S-24-P | CDGR-858S-24-B | |
| 8⅝” – Other 8R STC | CDGR-858S-O-P | CDGR-858S-O-B | |
| 9⅝” 8R STC | CDGR-958S-P | CDGR-958S-B>P110 or 958S-B<P110 | |
| 10¾” – 32.75# 8R STC | CDGR-1034S-32-P | CDGR-1034S-32-B | |
| 10¾” – Other 8R STC | CDGR-1034S-O-P | CDGR-1034S-O-B>P110 or CDGR-1034S-O-B<P110 | |
| 11¾” 8R STC | CDGR-1134S-P | CDGR-1134S-B>P110 or CDGR-1134S-B<P110 | |
| 13⅜” 8R STC | CDGR-1338S-P | 1338S-B>P110 or 1338S-B<P110 | |
| 16” 8R STC | CDGR-16S-P | CDGR-16S-B | |
| 18⅝” 8R STC | CDGR-1858S-P | CDGR-1858S-B | |
| 20” 8R STC | CDGR-20S-P | CDGR-20S-B>JK55 or CDGR-20S-B<JK55 | |
Frame Style Setting Standards for CDG Series Crest Diameter Gage
These frame style setting standards are designed to preset CDG Series gages for accurate inspection of API threaded connections. These standards consist of a rigid, non-adjustable steel block precision machined to proper size to tolerances of ±.0003”.
| Frame Style Setting Standards for CDG Series Crest Diameter Gage | |||
| Thread Type | Connections | PIN Standard Model | Box Standard Model |
| NUE | 2⅜” NUE | CDGF-238NUE-P | CDGF-238NUE-B |
| 2⅞” NUE | CDGF-278NUE-P | CDGF-278NUE-B | |
| 3½” NUE | CDGF-312NUE-P | CDGF-312NUE-B | |
| 4” NUE | CDGF-4NUE-P | CDGF-4NUE-B | |
| 4½” NUE | CDGF-412NUE-P | CDGF-412NUE-B | |
| EUE | 2⅜” EUE | CDGF-238EUE-P | CDGF-238EUE-B |
| 2⅞” EUE | CDGF-278EUE-P | CDGF-278EUE-B | |
| 3½” EUE | CDGF-312EUE-P | CDGF-312EUE-B | |
| 4” EUE | CDGF-4EUE-P | CDGF-4EUE-B | |
| 4½” EUE | CDGF-412EUE-P | CDGF-412EUE-B | |
| Thread Type | Connection | Pin Standard | Box Standard |
| Buttress | 4½” Buttress | CDGF-412B-P | CDGF-412B-B |
| 5” Buttress | CDGF-5B-P | CDGF-5B-B | |
| 5½” Buttress | CDGF-512B-P | CDGF-512B-B | |
| 6⅝” Buttress | CDGF-658B-P | CDGF-658B-B | |
| 7” Buttress | CDGF-7B-P | CDGF-7B-B | |
| 7⅝” Buttress | CDGF-758B-P | CDGF-758B-B | |
| 8⅝” Buttress | CDGF-858B-P | CDGF-858B-B | |
| 9⅝” Buttress | CDGF-958B-P | CDGF-958B-B | |
| 10¾” Buttress | CDGF-1034B-P | CDGF-1034B-B | |
| 11¾” Buttress | CDGF-1134B-P | CDGF-1134B-B | |
| 13⅜” Buttress | CDGF-1338B-P | CDGF-1338B-B | |
| 16” Buttress | CDGF-16B-P | CDGF-16B-B | |
| 18⅝” Buttress | CDGF-1858B-P | CDGF-1858B-B | |
| 20” Buttress | CDGF-20B-P | CDGF-20B-B | |
| LTC | 4½” 8R LTC | CDGF-412L-P | CDGF-412L-B |
| 5” 8R LTC | CDGF-5L-P | CDGF-5L-B | |
| 5½” 8R LTC | CDGF-512L-P | CDGF-512L-B | |
| 6⅝” 8R LTC | CDGF-658L-P | CDGF-658L-B | |
| 7” 8R LTC | CDGF-7L-P | CDGF-7L-B | |
| 7⅝” 8R LTC | CDGF-758L-P | CDGF-758L-B | |
| 8⅝” 8R LTC | CDGF-858L-P | CDGF-858L-B | |
| 9⅝” 8R LTC | CDGF-958L-P | CDGF-958L-B>P110 or CDGF-958L-B<P110 | |
| 20” 8R LTC | CDGF-20L-P | CDGF-20L-B>JK55 or CDGF-20L-B<JK55 | |
| Thread Type | Connection | Pin Standard | Box Standard |
| STC | 4½” – 9.50# 8R STC | CDGF-412S-9-P | CDGF-412S-9-B |
| 4½” – Other 8R STC | CDGF-412S-O-P | CDGF-412S-O-B | |
| 5” – 11.50# 8R STC | CDGF-5S-11-P | CDGF-5S-11-B | |
| 5” – Other 8R STC | CDGF-5S-O-P | CDGF-5S-O-B | |
| 5½” 8R STC | CDGF-512S-P | CDGF-512S-B | |
| 6⅝” 8R STC | CDGF-658S-P | CDGF-658S-B | |
| 7” – 17.00# 8R STC | CDGF-7S-17-P | CDGF-7S-17-B | |
| 7” – Other 8R STC | CDGF-7S-O-P | CDGF-7S-O-B | |
| 7⅝” 8R STC | CDGF-758S-P | CDGF-758S-B | |
| 8⅝” – 24.00# 8R STC | CDGF-858S-24-P | CDGF-858S-24-B | |
| 8⅝” – Other 8R STC | CDGF-858S-O-P | CDGF-858S-O-B | |
| 9⅝” 8R STC | CDGF-958S-P | CDGF-958S-B>P110 or 958S-B<P110 | |
| 10¾” – 32.75# 8R STC | CDGF-1034S-32-P | CDGF-1034S-32-B | |
| 10¾” – Other 8R STC | CDGF-1034S-O-P | CDGF-1034S-O-B>P110 or CDGF-1034S-O-B<P110 | |
| 11¾” 8R STC | CDGF-1134S-P | CDGF-1134S-B>P110 or CDGF-1134S-B<P110 | |
| 13⅜” 8R STC | CDGF-1338S-P | 1338S-B>P110 or 1338S-B<P110 | |
| 16” 8R STC | CDGF-16S-P | CDGF-16S-B | |
| 18⅝” 8R STC | CDGF-1858S-P | CDGF-1858S-B | |
| 20” 8R STC | CDGF-20S-P | CDGF-20S-B>JK55 or CDGF-20S-B<JK55 | |
Thread Lead Inspection/Lead Gages
FYOU PMEC lead gages use interchangeable contact points to inspect both pin and box threads for a wide variety of API tubing & casing connections. Lead inspection is both an API mandated requirement and an industry wide practice. Defined as the distance between threads as measure on a plane parallel to the centerline of the threaded part, lead variation has a direct effect on standoff, thread flank engagement, and make-up. Lead error is most commonly generated by manual and CNC lathes not cutting properly.
The lead gage inspects both internal and external thread leads using contact points that seat in the threads of a part. The pitch of the thread determines the diameter of the contact points required for taking measurements.
| P/N | Model | Measuring Range | Resolution | Description |
| EXL5B | WRW | 0.5～4in Thread Length | 0.02mm | External Lead Gage2-point, Tubing&Casing |
| INL5B | WRN | 0.5～4in Thread Length | 0.02mm | Internal Lead Gage 2-point, Tubing&Casing |
Lead Gage Setting Standard
FYOU PMEC’s precision lead gage setting standards are manufactured in accordance with API Specification 5B. Lead gage standards are used to set the gage prior to the inspection.
| P/N. | Model | Connection Type/Description | TPF | TPI |
| LDS-1001 | LJK-1001 | API 8-Round Casing, Tubing & Drill Pipe, All 10-Round Tubing | 3/4″ | 8 & 10 |
| LDS-1002 | LJK-1002 | API Buttress Casing, Internal/External, 4½” – 13⅜” | 3/4″ | 5 |
| LDS-1003 | LJK-1003 | API Buttress Casing, Internal/External,16″ – Larger | 1″ | 5 |
API Contact Points for Lead Gages
FYOU PMEC’s standard ball contact points are manufactured with carbide balls. Lead gages require two contact points. Contact points are sold individually.
| Model | Point Diameter | Threads Per Inch | Connection Type |
| CP090 | 0.090” (2.286mm) | 5 | Buttress Casing – Taper |
| CP072 | 0.072” (1.829mm) | 8 | API Tubing and Casing |
| CP062 | 0.062” (1.575mm) | 5 | Buttress Casing – Lead |
| CP057 | 0.057” (1.448mm) | 10 | API Tubing |
Thread Taper Inspection/Taper Gages
Tapered threads are a signature feature of API Tubing & Casing connections. Measuring thread taper is not only an industry wide practice, it is an API Specification 5B mandated inspection. During the manufacturing process, taper must be accurately measured and quantified to stay within the required specification limits. When subjected to a service load, taper error on threaded tubing and casing connections can lead to galling, improper fit, and reduced performance.
| P/N | Model | Measuring Range | Travel | Resolution |
| ETG0010 | JZW1 | 0~10 in, External Taper | 0～0.5in | 0.001in |
| ETG0816 | JZW2 | 8～16 in , External Taper | 0～0.5in | 0.001in |
| ETG0820 | JZW3 | 8～20 in , External Taper | 0～0.5in | 0.001in |
| ETG1405 | JZW4 | 1～4 1/2in , External Taper | 0～0.5in | 0.001in |
| ITG0106 | JZN06 | 1～6in, Internal Taper | 0～1in | 0.001in |
| ITG5516 | JZN16 | 5 1/2~16in, Internal Taper | 0～1in | 0.001in |
API Contact Points for Taper Gages
FYOU PMEC’s standard ball contact points are manufactured with carbide balls. Taper gages require two contact points. Contact points are sold individually.
| Model | Point Diameter | Threads Per Inch | Connection Type |
| CP090 | 0.090” (2.286mm) | 5 | Buttress Casing – Taper |
| CP072 | 0.072” (1.829mm) | 8 | API Tubing and Casing |
| CP062 | 0.062” (1.575mm) | 5 | Buttress Casing – Lead |
| CP057 | 0.057” (1.448mm) | 10 | API Tubing |
Thread Height Inspection/Thread Height Gages
Proper Thread Height maximizes the performance of the connection. Thread height inspection is an API requirement. FYOU PMEC thread height gages inspect external or internal thread height for a variety of thread forms. A shallow thread height may allow the connection to pull apart under stress.
| P/N | Model | Description | Connection | Range | Resolution |
| ETH5B-R | WGW | External Thread Height | 8-Round & 10-Round | 0～3.5 mm | 0.01mm |
| ITH5B-R | WGN | Internal Thread Height | 8-Round & 10-Round | 0～3.5mm | 0.01mm |
| TH5B-BTC | WGW2 | External/Internal Thread Height | 3/4″ TPF Buttress | 0～3.5mm | 0.01mm |
Thread Addendum Inspection-Thread Addendum Gages
Thread addendum is now a mandated inspection according to the API 5B Specification 16th Ed. FYOU PMEC also supply several models of thread addendum gages. Please specify the type of thread when ordering. Addendum gages require setting with a particular standard. Standard sold separately.
| P/N | Model | Description | Connection | Range | Resolution |
| EAD10R | WDGN1 | External Addendum | 10-Round | 0～3.5mm | 0.01mm |
| EAD08R | WDGN2 | External Addendum | 8-Round | 0～3.5mm | 0.01mm |
| IAD10R | WDGW1 | Internal Addendum | 10-Round | 0～3.5mm | 0.01mm |
| IAD08R | WDGW2 | Internal Addendum | 8-Round | 0～3.5mm | 0.01mm |
Thread Height/Addendum Gage Setting Standards
FYOU PMEC supply API mandated precision setting standards for presetting thread height/thread addendum gages. Please specify the type of thread when ordering.
| P/N | Model | Connection Type/Description | TPF | TPI |
| THR-1001 | CGK | API 8-Round Casing, Tubing & Drill Pipe, All 10-Round Tubing, Thread Height | 3/4″ | 8 & 10 |
| THB-1002 | CGK | API Buttress Casing, Internal/External, 4½” – 13⅜” ,Thread Height | 3/4″ | 5 |
| THB-1003 | CGK | API Buttress Casing, Internal/External, 16” – Larger ,Thread Height | 1” | 5 |
| ADD-1004 | CDGK | API 8-Round Casing, Tubing & Drill Pipe, All 10-Round Tubing, Thread Addendum | 3/4″ | 8 & 10 |
Thread Form Inspection-Thread Profile Gages
Correct thread form is important for a pipe end and coupling to make up properly. Doing a quick check using a FYOU PMEC thread profile verifies the thread form is correct.
Profile gages can also be used to perform a visual inspection of a thread form for detecting chipped inserts, steps, flat crested threads, stretched threads, wide first threads, or rolled over threads.
FYOU PMEC supply precision tapered thread profile gages for the quick identification of product thread forms. Specify the connection which is to be inspected when ordering. Special profiles will be quoted upon request
| Model | Connection Type | TPI, TPF, Thread Form |
| TPG-RTC-8R | API 8-Round Casing, Tubing & Drill Pipe | 8 TPI , 3/4″ TPF, 8 Round |
| TPG-RTC-10R | API 10-Round Tubing | 10 TPI , 3/4″ TPF, 10 Round |
| TPG-5BTC75-INT | API Buttress Casing, Internal, 4-1/2″- 13-3/8″ | 5 TPI , 3/4″ TPF, BTC, Internal |
| TPG-5BTC75-EXT | API Buttress Casing, External, 4-1/2″- 13-3/8″ | 5 TPI , 3/4″ TPF, BTC, External |
| TPG-5BTC1-INT | API Buttress Casing, Internal, 16″ – 20″ | 5 TPI , 1″ TPF, BTC, Internal |
| TPG-5BTC1-EXT | API Buttress Casing, External, 16″ – 20″ | 5 TPI , 1″ TPF, BTC, External |
Thread Form Overlay for Angle &Thread Form Measurement
Thread Form Overlays / Overlay of Thread Profile
As API Spec5B statement, Thread form shall be assessed with an optical comparator/profile projector. A thread form master overlay, physical or digital ,of known accuracy is required. thread angles shall be measured with an profile projector.
| P/N | Model | Description | Connection |
| OTF08R | YXLK-16-RD8 | 8 TPI Tubing&Casing Round Thread Form Overlays | 8 TPI, 3/4 TPF |
| OTF10R | YXLK-16-RD10 | 10 TPI Tubing Thread Form Overlays | 10 TPI, 3/4 TPF |
| OTF75B-Int | YXLK-16-BTC-N | Internal Thread, 5 TPI Buttress Casing Thread Form Overlays | 5TPI, 3/4 TPF, 4 1/2″~13 3/8″ |
| OTF0758B-Ext | YXLK-16-BTC-W1 | External Thread, 5 TPI Buttress Casing Thread Form Overlays | 5TPI, 3/4 TPF, 4 1/2″~7 5/8″ |
| OTF1338B-Ext | YXLK-16-BTC-W2 | External Thread, 5 TPI Buttress Casing Thread Form Overlays | 5TPI, 3/4 TPF, 8 5/8″~13 3/8″ |
| OTF10B-Int | YXLK-12-BTC-N | Internal Thread, 5 TPI Buttress Casing Thread Form Overlays | 5 TPI,1 TPF, 16″~20″ |
| OTF1620-Ext | YXLK-12-BTC-W | External Thread, 5 TPI Buttress Casing Thread Form Overlays | 5 TPI,1 TPF, 16″~20″ |
Buttress Casing Thread Form Gauge
Buttress Tooth Width/Thickness Gages
API Buttress threads are governed by the Specification 5B. The latest edition mandates the inspection of tooth thickness (the actual tooth thickness, the groove width, or shave).Tooth Thickness Gage meets API requirements for measuring tooth thickness/width or shave on API Buttress connections.
| P/N | Model | Description | Connection | Range | Resolution |
| TW-5B-750 | BCHG1 | Tooth Width Thickness Gage | 5 TPI, BTC, 4 1/2″~13 3/8″, 3/4″TPF | 0～2 mm | 0.01mm |
| TW-5B-1 | BCHG2 | Tooth Width Thickness Gage | 5 TPI, BTC, 16″~20″, 1″ TPF | 0～2 mm | 0.01mm |
Tooth Width Thickness Setting Standards
| P/N | Model | Description | Connection |
| EWS-5B-750 | BCHK1-W | Tooth Width Thickness Setting Standards | 5 TPI, BTC, 4 1/2″~13 3/8″, External |
| IWS-5B-750 | BCHK1-N | Tooth Width ThicknessSetting Standards | 5 TPI, BTC, 4 1/2″~13 3/8″, Internal |
| EWS-5B-1 | BCHK2-W | Tooth Width Thickness Setting Standards | 5 TPI, BTC, 16″~20″, External |
| IWS-5B-1 | BCHK2-N | Tooth Width Thickness Setting Standards | 5 TPI, BTC, 16″~20″, Internal |
Buttress Groove Width Gages
FYOU PMEC Groove Width Gage Series is comprised of Go/NoGo style gages used to quickly check the width of the groove on API Buttress connections. They meet the latest API inspection requirements for tooth thickness or groove width. Each model is for a certain taper and diameter.
| P/N | Model | Description | Connection |
| EGW-0758 | BCKG-W1 | Buttress Groove Width Gage ,Go/No Go | 5 TPI, BTC, 4 1/2″~7 5/8″, External |
| EGW-1338 | BCKG-W1-01 | Buttress Groove Width Gage ,Go/No Go | 5 TPI, BTC, 8 5/8″~13 3/8″, External |
| EGW-0020 | BCKG-W2 | Buttress Groove Width Gage,Go/No Go | 5 TPI, BTC, 16″~20″, External |
| IGW-1338 | BCKG-N1 | Buttress Groove Width Gage, Go/No Go | 5 TPI, BTC, 4 1/2″~13- 3/8″, Internal |
| IGW-0020 | BCKG-N2 | Buttress Groove Width Gage, Go/No Go | 5 TPI, BTC, 16″~20″, Internal |
Coupling Alignment Inspection-Coupling Alignment Gauge
Coupling Alignment Gauge for Coupling Alignment Inspection
Coupling Alignment gage ensures that the threads on both ends of the coupling are properly aligned with each other. Coupling alignment inspection is manadated by the 16th edition of the API 5B.
| P/N | Model | Description | Range | Resolution | Connection |
| CAG-0238 | JTG | Coupling Alignment Gage | ±2mm | 0.01mm | 2⅜” & Larger, EU, NU,STC,LTC, BTC |