Crest Diameter And Ovality Gages

Crest Diameter and Ovality Gages – MRP®

mrp group2gif - Crest Diameter And Ovality Gages

Thirty years ago, Gagemaker introduced the MRP® crest diameter and ovality gage which forever changed the industry. Today, the MRP® series of gages is the industry standard worldwide. Whether you call it Crest Diameter, Root Diameter, or Ball PD, Pitch Diameter governs the strength of the actual thread assembly and ensures API dimensional measurement specs are met. (Check out the new carbon fiber MRP AIR.)

The Gagemaker MRP® 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.

MRP® Crest Diameter and Ovality Gages

MRP-1000 Series Crest Diameter and Ovality Gages – 1” – 4½” Tubing

This MRP® series of gages detect variations in crest diameter (or pitch 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. All of these gages are API approved for use on tubing connections sized 1” – 4½”.

External/Internal	Range	External Range	Internal Range	Reach	Description	Model
Internal	1 – 2½”	–	1 – 2½”		Internal Small Crest/Pitch Diameter gage	MRP-202
External	1½” – 4½”	1 – 2½”	–	4.4”	External Crest Diameter Gage, 4.4” Reach	MRP-1001
Internal	1½” – 4½”		1½” – 4½”	4.4”	Internal Crest Diameter Gage, 4.4”	MRP-1002
External/Internal	1½” – 4½”	1½” – 4½”	1½” – 4½”	4.4”	External/Internal Crest Diameter Gage, 4.4” Reach, External Range 1½” – 4½”, Internal Range 1½” – 4½”	MRP-1003
External/Internal		1¾” – 4½”	2⅜” – 4½”	4.4”	Internal/External Pitch Diameter Gage for Two Step Seal. Upper and lower arms are .740” diameter. Upper arm has standard travel of .150”. Shipped with T125 pts.	MRP-1012-TSS
External/Internal		1¾” – 4½”	2⅜” – 4½”	4.4”	Internal/External Pitch Diameter Gage, Two Step Thread, w/ 1.030” Horseshoe standoff for front and rear measurements. Arms have .740” diameter. Upper arm has extended travel of .350”	MRP-1012-TST

MRP-2000 Series Crest Diameter and Ovality Gages – 2⅜” – 20” Casing & Tubing

External/Internal	External Range	Internal Range	Reach	Description	Model
External	2⅜” – 20”	–	4.4”	External Crest Diameter Gage, 4.4” reach	MRP-2001
External	2⅜” – 20”	–	4.4”	External Crest Diameter Gage, 4.4” Reach, Straight Blocks	MRP-2001-S
External	2⅜” – 20”	–	7”	External Crest Diameter Gage, 7” reach	MRP-2001-7
External	2⅜” – 20”	–	10”	External Crest Diameter Gage, 7” reach	MRP-2001-10
Internal	–	2⅜” – 20”	4¼”	Internal Crest Diameter Gage, 4¼” reach	MRP-2002
Internal	–	2⅜” – 20”	4¼”	Internal Crest Diameter Gage, 4¼” reach, Straight Blocks	MRP-2002-S
Internal	–	3½” – 20”	7”	Internal Crest Diameter Gage, 7” reach	MRP-2002-7
Internal	–	3½” – 20”	10”	Internal Crest Diameter Gage, 10” reach	MRP-2002-10
External/Internal	2⅜” – 20”	3½” – 20”	4¼”	Internal/External Crest Diameter Gage, 4¼” reach	MRP-2003
External/Internal	2⅜” – 20”	3½” – 20”	4¼”	External/Internal Crest Diameter Gage, 2⅜” – 20”, 4¼” reach, Straight Blocks	MRP-2003-S

MRP-3000 Series Crest Diameter and Ovality Gages – 8⅝” – 24” Casing

“This MRP® series of gages detect variations in crest diameter (or pitch 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. All of these gages are API approved for use on casing connections sized 8⅝” – 24”.

External/Internal	External Range	Internal Range	Reach	Description	Model
Internal	8⅝” – 24”	–	3⅜”	External Crest Diameter Gage, 3⅜” reach	MRP-3001
External	–	8⅝” – 24”	3⅜”	Internal Crest Diameter Gage, 3⅜” reach	MRP-3002
External/Internal	8⅝” – 24”	8⅝” – 24”	3⅜”	Internal/External Crest Diameter Gage, 3⅜” reach	MRP-3003
External/Internal	20” – 36”	20” – 36”	3⅜”	Internal/External Crest Diameter Gage, 3⅜” reach	MRP-3004

MRP-1500/2500/3500 Series Crest Diameter and Ovality Gages- 1½” – 24” Premium Connections

This MRP® series of gages detect variations in crest diameter (or pitch 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. All of these gages are approved for use on tubing and premium connections sized 1½” – 24”.

External/Internal	External Range	Internal Range	Reach	Description	Model
External/Internal	2⅞” – 4½”	1½” – 4½”	3⅜”	Solid Body External/Internal Crest Gage, 3⅜” Reach	MRP-1500
External	4½” – 9⅝”	–	4”	Solid Body External Pitch Diameter Gage, 4” reach	MRP-2511
External	4½” – 9⅝”	–	7”	Solid Body External Crest Diameter Gage, 7” reach	MRP-2511-7
Internal	–	4½” – 9⅝”	3⅜”	Solid Body Internal Crest Diameter Gage, 3⅜” reach	MRP-2512
Internal	–	2⅜” – 4½”	7”	Solid Body Internal Crest Diameter Gage, 7” reach	MRP-2512-7
External/Internal	4½” – 9⅝”	4½” – 9⅝”	3⅜”	Solid Body External/Internal Crest Diameter Gage, 3⅜” reach	MRP-2513
External	4½” – 13⅜”	–	4”	Solid Body External Crest Diameter Gage, 4” reach	MRP-2521
Internal	–	4½” – 13⅜”	4”	Solid Body Inernal Crest Diameter Gage, 4” reach	MRP-2522
External/Internal	4½” – 13⅜”	4½” – 13⅜”	4”	Solid Body External/Internal Crest Diameter Gage, 4” reach	MRP-2523
External	8⅝” – 24”	–	4”	Solid Body External Crest Diameter Gage, 6¼”” reach	MRP-3501
Internal	–	8⅝” – 24”	4”	Solid Body Internal Crest Diameter Gage, 6¼”” reach	MRP-3502
External/Internal	8⅝” – 24”	8⅝” – 24”	6¼””	Solid Body External/Internal Crest Diameter Gage, 6¼”” reach	MRP-3503

MRP® Setting Standards

MRP® Rod Style Setting Standards

Gagemaker MRP Standards Box and Pin 300x135 - Crest Diameter And Ovality Gages

Rod style setting standards are designed to preset MRP® crest diameter 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 Specifications 5B. The rod sets are securely attached together and labeled with the connection size and serial number. The rods set the location of the thread shoe and the distance between shoes for accurate inspection of threaded connections.

MRP® Frame Style Setting Standards

frame standards 300x249 - Crest Diameter And Ovality Gages

Frame style setting standards are designed to preset the MRP® crest diameter 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″. Round style standards, smaller than 2⅜”, are available as specials (contact us directly for more information).

Tubing Connections Rod & Frame Standards

EUE Connection MRP® Setting Standards

Connection Size	Rod Standard – Box	Rod Standard – Pin	Frame Standard – Box	Frame Standard – Pin
2⅜”	MRP-238EUE-B	MRP-238EUE-P	FSTD-238E-B2	FSTD-238E-P2
2⅞”	MRP-278EUE-B	MRP-278EUE-P	FSTD-278E-B2	FSTD-278E-P2
3½”	MRP-312EUE-B	MRP-312EUE-P	FSTD-312E-B2	FSTD-312E-P2
4”	MRP-4EUE-B	MRP-4EUE-P	FSTD-4E-B2	FSTD-4E-P2
4½”	MRP-412EUE-B	MRP-412EUE-P	FSTD-412E-B2	FSTD-412E-P2

NUE Connection MRP® Setting Standards

Connection Size	Rod Standard – Box	Rod Standard – Pin	Frame Standard – Box	Frame Standard – Pin
2⅜”	MRP-238NUE-B	MRP-238NUE-P	FSTD-238N-B2	FSTD-238N-P2
2⅞”	MRP-278NUE-B	MRP-278NUE-P	FSTD-278N-B2	FSTD-278N-P2
3½”	MRP-312NUE-B	MRP-312NUE-P	FSTD-312N-B2	FSTD-312N-P2
4”	MRP-4NUE-B	MRP-4NUE-P	FSTD-4N-B2	FSTD-4N-P2
4½”	MRP-412NUE-B	MRP-412NUE-P	FSTD-412N-B2	FSTD-412N-P2

Casing Connections Rod & Frame Standards

Buttress Connection MRP® Setting Standards

Connection Size	Rod Standard – Box	Rod Standard – Pin	Frame Standard – Box	Frame Standard – Pin
4½”	MRP-412B-B	MRP-412B-P	FSTD-412B-B2	FSTD-412B-P2
5”	MRP-5B-B	MRP-5B-P	FSTD-5B-B2	FSTD-5B-P2
5½”	MRP-512B-B	MRP-512B-P	FSTD-512B-B2	FSTD-512B-P2
6⅝”	MRP-658B-B	MRP-658B-P	FSTD-658B-B2	FSTD-658B-P2
7”	MRP-7B-B	MRP-7B-P	FSTD-7B-B2	FSTD-7B-P2
7⅝”	MRP-758B-B	MRP-758B-P	FSTD-758B-B2	FSTD-758B-P2
8⅝”	MRP-858B-B	MRP-858B-P	FSTD-858B-B2	FSTD-858B-P2
9⅝”	MRP-958B-B	MRP-958B-P	FSTD-958B-B2	FSTD-958B-P2
10¾”	MRP-1034B-B	MRP-1034B-P	FSTD-1034B-B2	FSTD-1034B-P2
11¾”	MRP-1134B-B	MRP-1134B-P	FSTD-1134B-B2	FSTD-1134B-P2
13⅜”	MRP-1338B-B	MRP-1338B-P	FSTD-1338B-B2	FSTD-1338B-P2
16”	MRP-16B-B	MRP-16B-P	FSTD-16B-B2	FSTD-16B-P2
18⅝”	MRP-1858B-B	MRP-1858B-P	FSTD-1858B-B2	FSTD-1858B-P2
20”	MRP-20B-B	MRP-20B-P	FSTD-20B-B2	FSTD-20B-P2

LTC Connection (8 Round) MRP® Setting Standards

Connection Size	Rod Standard – Box	Rod Standard – Pin	Frame Standard – Box	Frame Standard – Pin
4½”	MRP-412L-B	MRP-412L-P	FSTD-412L-B2	FSTD-412L-P2
5”	MRP-5L-B	MRP-5L-P	FSTD-5L-B2	FSTD-5L-P2
5½”	MRP-512L-B	MRP-512L-P	FSTD-512L-B2	FSTD-512L-P2
6”	MRP-6L-B	MRP-6L-P	FSTD-6L-B2	FSTD-6L-P2
6⅝”	MRP-658L-B	MRP-658L-P	FSTD-658L-B2	FSTD-658L-P2
7”	MRP-7L-B	MRP-7L-P	FSTD-7L-B2	FSTD-7L-P2
7⅝”	MRP-758L-B	MRP-758L-P	FSTD-758L-B2	FSTD-758L-P2
8⅝”	MRP-858L-B	MRP-858L-P	FSTD-858L-B2	FSTD-858L-P2
9⅝”	MRP-958L-B>P110 or MRP-958L-B<p110< td=””></p110<>	MRP-958L-P	FSTD-958L-B2>P110 or FSTD-958L-B2<p110< td=””></p110<>	FSTD-958L-P2
20”	MRP-20L-B>JK55 or MRP-20L-B<jk55< td=””></jk55<>	MRP-20L-P	FSTD-20L-B2>JK55 or FSTD-20L-B2<jk55< td=””></jk55<>	FSTD-20L-P2

STC Connection (8 Round) MRP® Setting Standards

Connection Size	Rod Standard – Box	Rod Standard – Pin	Frame Standard – Box	Frame Standard – Pin
4½”– 9.50#	MRP-412S-9-B	MRP-412B-9-P	FSTD-412B-9-B2	FSTD-412B-9-P2
4½” – Other	MRP-412S-O-B	MRP-412B-O-P	FSTD-412B-O-B2	FSTD-412B-O-P2
5” – 11.50#	MRP-5S-B	MRP-5S-P	FSTD-5S-B2	FSTD-5S-P2
5” – Other	MRP-5S-O-B	MRP-5S-O-P	FSTD-5S-O-B2	FSTD-5S-O-P2
5½”	MRP-512S-B	MRP-512S-P	FSTD-512S-B2	FSTD-512S-P2
6⅝”	MRP-658S-B	MRP-658S-P	FSTD-658S-B2	FSTD-658S-P2
7” – 17.00#	MRP-7S-17-B	MRP-7S-17-P	FSTD-7S-17-B2	FSTD-7S-17-P2
7” – Other	MRP-7S-O-B	MRP-7S-O-P	FSTD-7S-O-B2	FSTD-7S-O-P2
7⅝”	MRP-758S-B	MRP-758S-P	FSTD-758S-B2	FSTD-758S-P2
7⅝”	MRP-758S-B	MRP-758S-P	FSTD-758S-B2	FSTD-758S-P2
8⅝” – 24.00#	MRP-858S-24-B	MRP-858S-24-P	FSTD-858S-24-B2	FSTD-858S-24-P2
8⅝” – Other	MRP-858S-O-B	MRP-858S-O-P	FSTD-858S-O-B2	FSTD-858S-O-P2
9⅝”	MRP-958S-B>P110 or MRP-958S-B<p110< td=””></p110<>	MRP-958S-P	FSTD-958S-B2>P110 or FSTD-958S-B2<p110< td=””></p110<>	FSTD-958S-P2
10¾” – 32.75#	MRP-1034S-32-B	MRP-1034S-32-P	FSTD-1034S-32-B2	FSTD-1034S-32-P2
10¾” – Other	MRP-1034S-O-B>P110 or MRP-1034S-O-B<p110< td=””></p110<>	MRP-1034S-O-P	FSTD-1034S-O-B2>P110 or FSTD-1034S-O-B2<p110< td=””></p110<>	FSTD-1034S-O-P2
11¾”	MRP-1134S-B>P110 or MRP-1134S-B<p110< td=””></p110<>	MRP-1134S-P	FSTD-1134S -B2>P110 or FSTD-1134S-B2<p110< td=””></p110<>	FSTD-1134S-P2
13⅜”	MRP-1338S-B>P110 or MRP-1338S-B<p110< td=””></p110<>	MRP-1338S-P	FSTD-1338S-B2>P110 or FSTD-1338S-B2<p110< td=””></p110<>	FSTD-1338S-P2
16”	MRP-16S-B	MRP-16S-P	FSTD-16S-B2	FSTD-16S-P2
18⅝”	MRP-1858S-B	MRP-1858S-P	FSTD-1858S-B2	FSTD-1858S-P2
20”	MRP-20S-B>JK55 or MRP-20S-B<jk55< td=””></jk55<>	MRP-20S-P	FSTD-20S-B2>JK55 or FSTD-20S-B2<jk55< td=””></jk55<>	FSTD-20S-P2

MRP® Step Style Setting Standards

The step style setting standards are designed to preset several models of the MRP® Crest Diameter gage series 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”.

MRP® Step Style Setting Standards

Connection	Connection Size	Thread Form	TPI	TPF	Description	Box Model	Pin Model
8 Round & 10 Round	8 Round & 10 Round	EUE	8 & 10	¾”	MRP Step Style Standard for EUE threads	SSTD-B-EUE	SSTD-P-EUE
8 Round & 10 Round	8 Round & 10 Round	NUE	8 & 10	¾”	MRP Step Style Standard for NUE threads	SSTD-B-NUE	SSTD-P-NUE
8 Round	4½” – 6⅝”	STC	8	¾”	MRP Step Style Standard for 4½” – 6⅝” STC threads	SSTD-B-STC	SSTD-P-STC
8 Round	7” – 8⅝”	STC	8	¾”	MRP Step Style Standard for 7” – 8⅝” STC threads	SSTD-B-STC	SSTD-P-STC
8 Round	4½” – 9⅝”	LTC	8	¾”	MRP Step Style Standard for 4½” – 9⅝” LTC threads	SSTD-B-LTC	SSTD-P-LTC
8 & 11½ Pitch “V” Threads	2½” – 10”	Line Pipe & NPT	8 & 11½	¾”	MRP Step Style Standard for 2½” – 10” Line Pipe	SSTD-B-LP	SSTD-P-LP
¾” Buttress	4½” – 7⅝”	Buttress	5	¾”	MRP Step Style Standard for ¾” TPF Buttress, 4½” – 7⅝”	SSTD-B-BTC1	SSTD-P-BTC1
¾” Buttress	8⅝” – 13⅜”	Buttress	5	¾”	MRP Step Style Standard for ¾” TPF Buttress, 8⅝” – 13⅜”	SSTD-B-BTC2	SSTD-P-BTC2

MRP® Gage Shoes, Accessories and Replacement Parts

MRP® Gage Shoes & Accessories

Part Type	Gage	Length	Description	Model
Shoe	MRP-202	.500”	External Thread Shoe, ½” long for MRP-202	MRP-.500E
Shoe	All MRP® models	.625”	External Thread Shoe, ⅝” long	MRP-.625E
Shoe	All MRP® models	.625”	Internal Thread Shoe, ⅝” long	MRP-.625I
Shoe	All MRP® models	.750”	External Thread Shoe, ¾” long	MRP-.750
Shoe	All MRP® models	.875”	Thread Shoe, ⅞” long	MRP-.875
Shoe	All MRP® models	1.000”	Thread Shoe, 1.00” long	MRP-1.00
Shoe	All MRP® models	1.500”	Thread Shoe, 1.50” long	MRP-1.50
Shoe	All MRP® models	2.250”	Thread Shoe, 2.25” long	MRP-2.25
Shoe	All MRP® models	20 mm	Metric Thread Shoe, 20 mm long	MRP-20mm
Setting Stand	All MRP® models	–	MRP® gage setting stand	MRP-GSS

MRP® Gage Replacement Parts

Part Type	Corresponding Gage(s)	Resolution	Description
Block Set	MRP-1000 Series	MRP-1000 series block set for .375″ arms	MRP-10BL
Lower Arm	MRP-1000 Series	MRP-1000 series lower arm, .375″ diameter	MRP-10LA
Upper Arm	MRP-1000 Series	MRP-1000 series upper arm, .375″ diameter	MRP-10UA
Knob	MRP-1000 Series	MRP-1000 knob, short	MRP-10KB-S
Block Set	MRP-1000 Series	MRP-1000 series block set for 0.5” diameter arms	MRP-10SBL
Knob	MRP-1000 Series	MRP-1000 knob, long	MRP-10KB-L
Spring Plunger	MRP-1000 Series	MRP-1000 series spring plunger	MRP-10SP
Wear Pad Set	MRP-1000 Series	MRP-1000 series wear pad set	MRP-10WP
Lower Arm	MRP-1000 Series	MRP-1000 series lower arm, .5″ diameter	MRP-11LA
Upper Arm	MRP-1000 Series	MRP-1000 series upper arm for external/pin connections, .5″ diameter	MRP-11UA
Upper Arm	MRP-1000 Series	MRP-1000 series upper arm for internal/box connections, .5″ diameter	MRP-12UA
Block Set	MRP-2000 Series	MRP-2000 series block set	MRP-20BL
Arm Clamp	MRP-2000 Series	MRP-2000 series arm clamp	MRP-20BL
Spring Plunger	MRP-2000 Series	MRP-2000 series spring plunger	MRP-20SP
Knob	MRP-2000 Series	MRP-2000 series knob	MRP-20KB
Wear Pad Set	MRP-2000 Series	MRP-2000 wear pad set	MRP-20WP
Wear Pad Set	MRP-2000 Series	MRP-2000 extended wear pad set	MRP-20WPEX
Rail	MRP-2000 Series	MRP-2000 series 12″ cross rail	MRP-RAIL-12
Rail	MRP-2000 Series	MRP-2000 series 18″ cross rail	MRP-RAIL-18
Rail	MRP-2000 Series	MRP-2000 series 24″ cross rail	MRP-RAIL-24
Wear Pad Set	MRP-3000 Series	MRP-3000 wear pad set	MRP-30WP
Wear Pad Set	MRP-3000 Series	MRP-3000 extended wear pad set	MRP-30WPEX