Torq N Seal High Pressure Heat Exchanger Tube Plugs

Torq N Seal one-piece mechanical heat-exchanger tube plugs, expanded with a torque wrench. Manufacturer range: 0.250–2.500 inch tube ID, with pressure ratings up to 7,000 psi subject to the selected plug and application.

Torq N Seal mechanical heat-exchanger tube plugs form a metal-to-metal seal by expanding a one-piece plug body. They are used in applications such as feedwater heaters, condensers, preheaters and fin-fan coolers, with size and alloy selected for the actual tube and service.

Jump to the high-pressure plug selector

Size, material and pressure selection

Manufacturer tube-ID range: 0.250–2.500 inches (6.35–63.50 mm); other sizes can be reviewed on request.
Manufacturer pressure rating: up to 7,000 psi. Confirm the selected size, material and service conditions against the applicable documentation.
Nominal plug expansion: approximately 0.035 inch (0.89 mm).
Material options include brass, carbon steel, 304 and 316 stainless steel, duplex, Inconel and titanium.

Send Justram the measured tube bore, wall thickness, tube and tubesheet materials, operating pressure and temperature, process fluid and quantity. Material matching and the condition of the sealing area are part of selection.

Torq N Seal high-pressure plug selector

Start with your tube size, choose the tube material, then review the details before adding them to your enquiry. On-site measured ID is the preferred sizing method.

1. Tube size

Measurement method or Calculated ID (Select)

Preferred: Measure the actual bore at the intended plug expansion area using an inside tube micrometer or gauging block. This captures as-found dimensions and tubing tolerances, particularly for minimum-wall tubing.

Actual measured tube ID (inches)

Where and how to measure

Remove loose scale and corrosive oxide deposits that could affect the reading.
Measure within the supported tube/tubesheet interface, where the plug’s expansion area will sit.
Measure past welds and indentations, not across a weld overhang.

An overhanging weld may require assessment and reaming to admit the correctly sized plug. Confirm preparation and installation procedures before altering the bore.

Your measurement is retained exactly as entered. No nominal-ID formula, rounding or rolling allowance is applied.

Measurement location / bore observations

2. Tube material

Select the tube’s material. Justram will confirm the final plug alloy and part designation for your service.

Tube material

Choose a material to see its data-sheet reference.

Material options and data-sheet designations

Transcribed from the supplied data sheet. The sheet labels its columns “AISI” and “ASTM”; some entries require clarification and are marked below. These entries are reference information, not certification of the supplied product. Confirm the applicable specification and material documentation when ordering.

Materials listed on the supplied data sheet
Alloy (sheet code)	Grade listed	Specification listed
Carbon steel (CS)*	12L14	A108
Admiralty brass (BR)*	C46400	B171
316 stainless steel (SS)*	316	S276 — verify designation
Carbon steel (CS1018)	1018	A108-13
Carbon steel (CSF22)	F22	A182-F22
Carbon steel (CSF11)	F11	A182-F11
303 stainless steel (SS303)	303	S582 — verify designation
304 stainless steel (SS304)	304	S582 — verify designation
410 stainless steel (SS410)	410	S410 — verify designation
347 stainless steel (SS347)	347	S347 — verify designation
90/10 copper-nickel (CuNi)	C70600	SB151
70/30 copper-nickel (CuNi73)	C71500	B122
Titanium (TIGr2)	Grade 2	SB348
Duplex (DUP)	2205	A240
Super duplex (SDUP)	2507	A240
Incoloy 825 (IN825)	825	B425
Inconel 718 (IN718)	276 — conflicts with alloy name; verify	B637
Monel 400 (MON400)	400	SB164
Hastelloy 276 (HAS276)	276	B574

* Marked as stock alloys on the supplied sheet; current Justram availability must be confirmed. Alloy and specification codes are reproduced as supplied, including entries flagged for review.

Include tubesheet material, process fluid, pressure, temperature and certification requirements in your enquiry.

3. Review and enquire

Minimum quantity: 10 plugs.

Quantity (minimum 10)

Enter your tube ID

A sizing reference is not approval for service. Justram must confirm the measured bore, plug alloy and application before ordering.

Standard chart coverage: 1/2–1-1/2 inch tube OD, with listed IDs from 0.260 to 1.456 inches. Other sizes may be available on request.

Tube size & BWG sizing guide — average-wall tubing

Assumes average-wall tubing. For minimum-wall tubing, the tube-ID calculation differs: contact Justram. Dimensions are in inches. Base plug references below exclude the material suffix. Nominal tube ID = OD − 2 × wall thickness.

Tube dimensions and base plug references
Tube OD	BWG	Wall	Tube ID	Base plug
1/2″	11	0.120	0.260	TNS-260
1/2″	12	0.109	0.282	TNS-280
1/2″	13	0.095	0.310	TNS-310
1/2″	14	0.083	0.334	TNS-330
1/2″	15	0.072	0.356	TNS-350
1/2″	16	0.065	0.370	TNS-370
1/2″	17	0.058	0.384	TNS-380
1/2″	18	0.049	0.402	TNS-400
1/2″	19	0.042	0.416	TNS-410
1/2″	20	0.035	0.430	TNS-430
1/2″	21	0.032	0.436	TNS-430
1/2″	22	0.028	0.444	TNS-440
1/2″	23	0.025	0.450	TNS-450
1/2″	24	0.022	0.456	TNS-450
5/8″	10	0.134	0.357	TNS-350
5/8″	11	0.120	0.385	TNS-380
5/8″	12	0.109	0.407	TNS-400
5/8″	13	0.095	0.435	TNS-430
5/8″	14	0.083	0.459	TNS-450
5/8″	15	0.072	0.481	TNS-480
5/8″	16	0.065	0.495	TNS-490
5/8″	17	0.058	0.509	TNS-500
5/8″	18	0.049	0.527	TNS-520
5/8″	19	0.042	0.541	TNS-540
5/8″	20	0.035	0.555	TNS-550
5/8″	21	0.032	0.561	TNS-560
5/8″	22	0.028	0.569	TNS-560
5/8″	23	0.025	0.575	TNS-570
5/8″	24	0.022	0.581	TNS-580
3/4″	10	0.134	0.482	TNS-480
3/4″	11	0.120	0.510	TNS-510
3/4″	12	0.109	0.532	TNS-530
3/4″	13	0.095	0.560	TNS-560
3/4″	14	0.083	0.584	TNS-580
3/4″	15	0.072	0.606	TNS-600
3/4″	16	0.065	0.620	TNS-620
3/4″	17	0.058	0.634	TNS-630
3/4″	18	0.049	0.652	TNS-650
3/4″	19	0.042	0.666	TNS-660
3/4″	20	0.035	0.680	TNS-680
3/4″	21	0.032	0.686	TNS-680
3/4″	22	0.028	0.694	TNS-690
3/4″	23	0.025	0.700	TNS-700
3/4″	24	0.022	0.706	TNS-700
7/8″	10	0.134	0.607	TNS-600
7/8″	11	0.120	0.635	TNS-630
7/8″	12	0.109	0.657	TNS-650
7/8″	13	0.095	0.685	TNS-680
7/8″	14	0.083	0.709	TNS-700
7/8″	15	0.072	0.731	TNS-730
7/8″	16	0.065	0.745	TNS-740
7/8″	17	0.058	0.759	TNS-750
7/8″	18	0.049	0.777	TNS-770
7/8″	19	0.042	0.791	TNS-790
7/8″	20	0.035	0.805	TNS-800
7/8″	21	0.032	0.811	TNS-810
7/8″	22	0.028	0.819	TNS-810
7/8″	23	0.025	0.825	TNS-820
7/8″	24	0.022	0.831	TNS-830
1″	10	0.134	0.732	TNS-730
1″	11	0.120	0.760	TNS-760
1″	12	0.109	0.782	TNS-780
1″	13	0.095	0.810	TNS-810
1″	14	0.083	0.834	TNS-830
1″	15	0.072	0.856	TNS-850
1″	16	0.065	0.870	TNS-870
1″	17	0.058	0.884	TNS-880
1″	18	0.049	0.902	TNS-900
1″	19	0.042	0.916	TNS-910
1″	20	0.035	0.930	TNS-930
1″	21	0.032	0.936	TNS-930
1″	22	0.028	0.944	TNS-940
1″	23	0.025	0.950	TNS-950
1″	24	0.022	0.956	TNS-950
1-1/4″	10	0.134	0.982	TNS-980
1-1/4″	11	0.120	1.010	TNS-1010
1-1/4″	12	0.109	1.032	TNS-1030
1-1/4″	13	0.095	1.060	TNS-1060
1-1/4″	14	0.083	1.084	TNS-1080
1-1/4″	15	0.072	1.106	TNS-1100
1-1/4″	16	0.065	1.120	TNS-1120
1-1/4″	17	0.058	1.134	TNS-1130
1-1/4″	18	0.049	1.152	TNS-1150
1-1/4″	19	0.042	1.166	TNS-1160
1-1/4″	20	0.035	1.180	TNS-1180
1-1/4″	21	0.032	1.186	TNS-1180
1-1/4″	22	0.028	1.194	TNS-1190
1-1/4″	23	0.025	1.200	TNS-1200
1-1/4″	24	0.022	1.206	TNS-1200
1-1/2″	10	0.134	1.232	TNS-1230
1-1/2″	11	0.120	1.260	TNS-1260
1-1/2″	12	0.109	1.282	TNS-1280
1-1/2″	13	0.095	1.310	TNS-1310
1-1/2″	14	0.083	1.334	TNS-1330
1-1/2″	15	0.072	1.356	TNS-1350
1-1/2″	16	0.065	1.370	TNS-1370
1-1/2″	17	0.058	1.384	TNS-1380
1-1/2″	18	0.049	1.402	TNS-1400
1-1/2″	19	0.042	1.416	TNS-1410
1-1/2″	20	0.035	1.430	TNS-1430
1-1/2″	21	0.032	1.436	TNS-1430
1-1/2″	22	0.028	1.444	TNS-1440
1-1/2″	23	0.025	1.450	TNS-1450
1-1/2″	24	0.022	1.456	TNS-1450

Operating limits and material selection

Pressure: Up to 7,000 psi (approximately 48.3 MPa / 48,263 kPa), subject to the selected plug, material and application. Temperature: The supplied data sheet ties the limit to the tube material; confirm the allowable temperature for the actual plug alloy and service conditions. This is not a universal temperature rating.

Provide tube and tubesheet materials, process fluid, operating pressure and temperature, quantity and any certification requirements. Material names and codes in the data sheet may differ from the online selector’s suffixes; Justram must confirm the ordered alloy and part designation.

Installation tooling and torque

Use a suitable 3/8-inch square-drive torque wrench with the correct Hex Capture Driver. The supplied sheet lists these hex-driver sizes by its stated plug-size band:

Hex Capture Driver	Plug-size band (inches)
1/4 inch	0.410–0.560
5/16 inch	0.570–0.710
3/8 inch	0.720–1.150

Confirm the driver for the supplied plug, especially outside these bands. Hex-driver size and the torque wrench’s square-drive size are different dimensions.

Use the installation torque on the supplied plug-box label and the applicable instructions. The attached sheet and current published installation table differ in torque values, size bands and material groupings. A single torque schedule cannot be confirmed from these conflicting sources. Justram should confirm the applicable requirement for the ordered plug; do not derive torque from the nominal size selector.

Torque values are expressed in inch-pounds (in-lb), not foot-pounds (ft-lb). Keep the expansion/sealing area within the supported tubesheet depth.

Contact Justram for sizing support

Installation and tooling

Installation uses a suitable 3/8-inch square-drive torque wrench and Hex Capture Driver. The required torque varies with plug size and material; use the supplied plug-box label and manufacturer instructions. Keep the sealing area within the supported tubesheet depth and have damaged or unsuitable bores assessed before installation.

See the Torq N Seal installation instructions for preparation, placement and tightening requirements.

Canadian registration and documentation

Canadian Registration Number (CRN) documentation is available for specified applications and jurisdictions. Include the installation province, applicable code and certification requirements with your quotation request so coverage can be checked for the supplied plugs. Refer to the manufacturer’s Canadian registration information.

Compare tube-plug options

For service up to 1,000 psi requiring a wider expansion range, see the Torq N Seal Medium Pressure tube plugs, made to order with a dedicated material and sizing selector. Confirm the selected plug and application with Justram.

For lower-pressure applications, compare Torq N Seal elastomer condenser plugs. Contact Justram for a tube-plug quotation.

Torq N Seal High Pressure Heat Exchanger Tube Plugs

Size, material and pressure selection