When you need to hold pipe together or add an outlet to your piping system, browse United Titanium’s inventory of pipe nipples, pipe plugs, weldolets and weld caps. Available in a variety of sizes and styles, we manufacture our pipe fittings in titanium grades 2 and 7, as well as zirconium grade 702. We stock pipe nipples threaded on one or both ends in sizes ranging from 1/2” to 2”. Our pipe plug sizes range from 1/8” to 1”. Weldolets, threadolets and sockolets are made on application to your requirements.
Specialty Metal Pipe Plugs and Caps
Dimensions
Square Head Pipe Plug Dimensions
| Nom. Pipe Size | A | B | C |
| 1/8" | 3/8 | 1/4 | 9/32 |
| 1/4" | 7/16 | 1/4 | 3/8 |
| 3/8" | 1/2 | 5/16 | 7/16 |
| 1/2" | 9/16 | 3/8 | 9/16 |
| 3/4" | 5/8 | 7/16 | 5/8 |
| 1" | 3/4 | 1/2 | 1-3/16 |
| 1-1/4" | 13/16 | 9/16 | 1-5/16 |
| 1-1/2" | 13/16 | 5/8 | 1-1/8 |
| 2" | 7/8 | 11/16 | 1-5/16 |
Hexagonal Head Plug Dimensions
| Nom. Pipe Size | A | E | D |
| 1/8" | 3/8 | 3/16 | 7/16 |
| 1/4" | 7/16 | 3/16 | 9/16 |
| 3/8" | 1/2 | 1/4 | 11/16 |
| 1/2" | 9/16 | 1/4 | 7/8 |
| 3/4" | 5/8 | 5/16 | 1-1/16 |
| 1" | 3/4 | 5/16 | 1-5/16 |
| 1-1/4" | 13/16 | 9/16 | 1-3/4 |
| 1-1/2" | 13/16 | 5/8 | 2 |
| 2" | 7/8 | 11/16 | 2-1/2 |
Weld Caps Dimensions
| Nom. Pipe Size |
Outside Diameter at Bevel |
E | Limiting Wall Thickness for Length | Length |
| 1/2" | 0.84 | 1.00 | 0.18 | 1.00 |
| 3/4" | 1.05 | 1.00 | 0.15 | 1.00 |
| 1" | 1.32 | 1.50 | 0.18 | 1.50 |
| 1-1/4" | 1.66 | 1.50 | 0.19 | 1.50 |
| 1-1/2" | 1.90 | 1.50 | 0.20 | 1.50 |
| 2" | 2.38 | 1.50 | 0.22 | 1.75 |
| 2-1/2" | 2.88 | 1.50 | 0.28 | 2.00 |
| 3" | 3.50 | 2.00 | 0.30 | 2.50 |
| 3-1/2" | 4.00 | 2.50 | 0.32 | 3.00 |
| 4" | 4.50 | 2.50 | 0.34 | 3.00 |
| 5" | 5.56 | 3.00 | 0.38 | 3.50 |
| 6" | 6.62 | 3.50 | 0.43 | 4.00 |
| 8" | 8.62 | 4.00 | 0.50 | 5.00 |
| 10" | 10.75 | 5.00 | 0.50 | 6.00 |
| 12" | 12.75 | 6.00 | 0.50 | 7.00 |
| 14" | 14.00 | 6.50 | 0.50 | 7.50 |
| 16" | 16.00 | 7.00 | 0.50 | 8.00 |
| 18" | 18.00 | 8.00 | 0.50 | 9.00 |
| 20" | 20.00 | 9.00 | 0.50 | 10.00 |
| 22" | 22.00 | 10.00 | 0.50 | 10.00 |
| 24" | 24.00 | 10.50 | 0.50 | 12.00 |
| 26" | 26.00 | 10.50 | ||
| 28" | 28.00 | 10.50 | ||
| 30" | 30.00 | 10.50 | ||
| 32" | 32.00 | 10.50 | ||
| 34" | 34.00 | 10.50 | ||
| 36" | 36.00 | 10.50 | ||
| 38" | 38.00 | 12.00 | ||
| 40" | 30.00 | 12.00 | ||
| 42" | 42.00 | 12.00 | ||
| 44" | 44.00 | 13.50 | ||
| 46" | 46.00 | 13.50 | ||
| 48" | 48.00 | 13.50 |
Applications
Titanium and Zirconium Pipe Nipple, Plug, Weldolet and Weld Cap Applications
Whether it’s a titanium nipple or a zirconium pipe plug, these fittings are often use for piping systems across a variety of industries including oil and gas production, petrochemical processing and chemical containment. As corrosion resistant alloys, titanium and zirconium protect against harsh, oxidizing environments, particularly saltwater, steam, organic acids, mineral acids and alkalis. These pipe fittings provide reliable strength and airtight tolerances for high-temperature and high-pressure applications.
Materials
| Titanium | Zirconium |
| CP-TI (Grade 2) | 702 |
| TI-PD (Grade 7) |
Specifications
View our pipe nipple, plug and weldolet inventory below and quickly request a quote by entering your desired quantity and clicking the Add to RFQ button. Use the search filter to help narrow down your selection. Add additional items by navigating through the fittings, fasteners and mill products inventory. Once you are ready to submit your request, simply open the RFQ cart at the bottom of the page and click submit.
Inventory List
Sort by Material
S-01-3910S0750
3/4" S/10S WELD CAP TI GR 2
In Stock
: 8
S-01-3910S1000
1" S/10S WELD CAP TI GR 2
In Stock
: 10
S-01-3910S1500
1-1/2" S/10S WELD CAP TI GR 2
In Stock
: 8
S-01-3910S2000
2" S/10S WELD CAP TI GR 2
In Stock
: 16
S-01-3910S3000
3" S/10S WELD CAP TI GR 2
In Stock
: 16
S-01-3910S4000
4" S/10S WELD CAP TI GR 2
In Stock
: 5
S-01-3910S6000
6" S/10S WELD CAP TI GR 2
In Stock
: 16
S-01-3910S8000
8" S/10S WELD CAP TI GR 2
In Stock
: 13
S-01-3940S0750
3/4" S/40S WELD CAP TI GR 2
In Stock
: 16
S-01-3940S1000
1" S/40S WELD CAP TI GR 2
In Stock
: 26
S-01-3940S1500
1-1/2" S/40S WELD CAP TI GR 2
In Stock
: 5
S-01-3940S2000
2" S/40S WELD CAP TI GR 2
In Stock
: 35
S-01-3940S3000
3" S/40S WELD CAP TI GR 2
In Stock
: 6
S-01-3940S4000
4" S/40S WELD CAP TI GR 2
In Stock
: 4
S-01-3940S6000
6" S/40S WELD CAP TI GR 2
In Stock
: 7
S-01-3940S8000
8" S/40S WELD CAP TI GR2
In Stock
: 8
S-01-4200S02
1/4" HEX HD PIPE PLUG TI GR 2
In Stock
: 233
S-01-4200S03
3/8" HEX HD PIPE PLUG TI GR 2
In Stock
: 62
S-01-4200S04
1/2" HEX HD PIPE PLUG TI GR 2
In Stock
: 44
S-01-4200S06
3/4" HEX HD PIPE PLUG TI GR 2
In Stock
: 21
S-01-4200S08
1" HEX HD PIPE PLUG TI GR 2
In Stock
: 17
S-01-4200S12
1-1/2" 3000# HEX HEAD PIPE PLUG TI GR2
In Stock
: 15
S-01-4200S16
2" 3000# HEX HEAD PIPE PLUG TI GR2
In Stock
: 9
S-01-4800S02
Ti-2 SQUARE HEAD PIPE PLUG 1/4"
In Stock
: 76
S-01-4800S03
Ti-2 SQUARE HEAD PIPE PLUG 3/8"
In Stock
: 24
S-01-4800S04
Ti-2 SQUARE HEAD PIPE PLUGg 1/2"
In Stock
: 5
S-01-4800S06
Ti-2 SQUARE HEAD PIPE PLUG 3/4"
In Stock
: 12
S-01-4800S08
Ti-2 SQUARE HEAD PIPE PLUG 1"
In Stock
: 6
S-03-3940S3000
3" S/40S WELD CAP TI GR7
In Stock
: 13
S-03-3940S4000
4" S/40S WELD CAP TI GR7
In Stock
: 13
S-03-4200S04
1/2" HEX HD PIPE PLUG TI GR 7
In Stock
: 12
S-03-4200S06
3/4" HEX HD PIPE PLUG TI GR 7
In Stock
: 15
S-03-4200S08
1" HEX HD PIPE PLUG TI GR 7
In Stock
: 15
S-04-3940S1000
1" S/40 WELD CAP ZIRC 702
In Stock
: 6
S-04-3940S1500
1-1/2" S/40 WELD CAP ZIRC 702
In Stock
: 6
S-04-3940S2000
2" S/40 WELD CAP ZIRC 702
In Stock
: 4
S-04-3940S6000
6" S/40 WELD CAP ZIRC 702
In Stock
: 2
S-04C4200S02
1/4" HEX HD PIPE PLUG ZIRC 702
In Stock
: 24
S-04C4200S04
1/2" HEX HD PIPE PLUG ZIRC 702
In Stock
: 24
S-04C4200S06
3/4" HEX HD PIPE PLUG ZIRC 702
In Stock
: 2
S-04C4200S08
1" HEX HD PIPE PLUG ZIRC 702
In Stock
: 2