Split Tees for Hot-Tap
Split (saddle) tees for hot-tap and in-service branch connections, in carbon, high-yield, alloy, stainless, duplex and nickel grades. We supply the fitting; the in-service operation is separate.
Technical specification
| Parameter | Specification |
|---|---|
| Product | Split (saddle) & full-encirclement tees for hot-tap / in-service branch connections — fitting supplied; in-service operation is separate |
| Body standard | ASME B16.9 · MSS SP-75 (high-yield) · MSS SP-97 outlets |
| End preparation | Bevel to ASME B16.25 |
| Run size | 4" – 60" NPS (larger to order); branch to design |
| Wall / schedule | To pipeline design; custom wall |
| Host (run) pipe | Existing run OD, wall, grade & design conditions are inputs — not supplied |
| Material specifications | ASTM A234, A860, A403, A815, B366 |
| Sour service | NACE MR0175 / ISO 15156 where specified |
| Documentation | EN 10204 3.1 / 3.2, PMI, TPI |
How it is made
Split tees are forged or fabricated from pipe and plate as a full-encirclement or saddle body sized to a specific run pipe, then heat treated and machined to the approved drawing. High-yield pipeline bodies (A860 WPHY) are normalised, normalised & tempered or quenched & tempered to meet the grade. Longitudinal and outlet welds are made to a qualified procedure and inspected after welding and heat treatment. Supplying the split tee is separate from the in-service hot-tap, tapping or line-stopping operation, which the qualified operator or contractor carries out under their own procedures, the applicable code and verified equipment compatibility.
Grades & materials
Representative grades for split tees, with representative chemistry. Exact grade, class and condition are confirmed per order.
| Material family | Grades | UNS | Standard | Service |
|---|---|---|---|---|
| Carbon steel | A234 WPB, WPC | — | ASME B16.9 / A234 | General |
| High-yield pipeline | A860 WPHY 42/46/52/60/65/70 | — | ASME B16.9 / A860 · MSS SP-75 | Pipeline |
| Cr-Mo alloy | A234 WP11, WP22, WP91 | — | ASME B16.9 / A234 | High-temperature |
| Austenitic stainless | A403 WP304/304L, 316/316L, 321, 347 | — | ASME B16.9 / A403 | Corrosion |
| Duplex / super duplex | A815 S31803 (2205), S32750 (2507) | — | ASME B16.9 / A815 | Chloride / sour |
| Nickel alloys | B366 WPNCI (600), WPNCMC (625), WPHC276 (C-276) | — | ASME B16.9 / B366 | Severe corrosion |
Chemical composition (representative)
| Grade | C | Mn | Si | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|
| A234 WPB | 0.30 max | 0.29–1.06 | 0.10 min | — | — | — | — |
| A860 WPHY 52 | 0.22 max | 1.60 max | 0.45 max | — | — | — | Nb+V+Ti 0.15 max |
| A860 WPHY 65 | 0.22 max | 1.65 max | 0.45 max | — | — | — | Nb+V+Ti 0.15 max |
| A234 WP22 | 0.05–0.15 | 0.30–0.60 | 0.50 max | 1.90–2.60 | — | 0.87–1.13 | — |
| A403 316L | 0.030 max | 2.00 max | 0.75 max | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | — |
| A815 S32750 | 0.030 max | 1.20 max | 0.80 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | N 0.24–0.32 |
| B366 625 | 0.10 max | 0.50 max | 0.50 max | 20.0–23.0 | 58.0 min | 8.0–10.0 | Nb 3.15–4.15 |
Standards & specifications
By product type
- ASME B16.9 wrought fittings (body)
- MSS SP-75 high-yield (WPHY) pipeline fittings
- MSS SP-97 integrally reinforced branch outlets
- ASME B16.25 weld-end preparation
Material & service
- ASTM A234/A860 carbon & high-yield
- ASTM A403/A815 stainless & duplex
- ASTM B366 nickel alloys
- NACE MR0175 / ISO 15156 for sour service; in-service hot-tap / line-stopping to the operator's code (e.g. API RP 2201), by the contractor
Mechanical properties (representative grades)
Representative grades — full MTC values on request. Values are ASTM/ASME specification minima or ranges at room temperature.
| Grade | Type | Tensile (MPa) | Yield min (MPa) | Elong min (%) |
|---|---|---|---|---|
| A234 WPB | Carbon | 415–585 | 240 | 22 |
| A234 WPC | Carbon | 485–655 | 275 | 20 |
| A860 WPHY 42 | High-yield | 414 | 290 | per A860 |
| A860 WPHY 46 | High-yield | 434 | 317 | per A860 |
| A860 WPHY 52 | High-yield | 455 | 359 | per A860 |
| A860 WPHY 60 | High-yield | 517 | 414 | per A860 |
| A860 WPHY 65 | High-yield | 531 | 448 | per A860 |
| A860 WPHY 70 | High-yield | 565 | 483 | per A860 |
| A234 WP11 Cl.1 | 1¼Cr-½Mo | 415–585 | 205 | 20 |
| A234 WP22 Cl.1 | 2¼Cr-1Mo | 415–585 | 205 | 20 |
| A234 WP91 | 9Cr-1Mo-V | 585–760 | 415 | 20 |
| A403 WP304 / 304L | Austenitic SS | 515 / 485 | 205 / 170 | 35 |
| A403 WP316 / 316L | Austenitic SS | 515 / 485 | 205 / 170 | 35 |
| A403 WP321 / 347 | Austenitic SS | 515 | 205 | 35 |
| A815 WPS31803 (2205) | Duplex | 620 | 450 | 25 |
| A815 WPS32750 (2507) | Super duplex | 795 | 550 | 15 |
| B366 WPNCI (600) | Ni-Cr | 550 | 240 | 30 |
| B366 WPNCMC (625) | Ni-Cr-Mo | 760 | 345 | 30 |
| B366 WPHC276 (C-276) | Ni-Mo-Cr | 690 | 283 | 40 |
Testing, inspection & documentation
| Test / document | Detail |
|---|---|
| Chemical / PMI | Product-analysis chemistry; PMI on alloy, stainless & nickel |
| Tensile | Tensile, yield and elongation per grade (A860 elongation by formula) |
| Impact (Charpy) | Pipeline / low-temp grades at the specified test temperature |
| Hardness | Brinell/Rockwell; NACE MR0175 for sour service |
| Weld / attachment | Longitudinal and outlet welds inspected after welding & heat treatment (qualified procedure) |
| NDE | UT / RT / MPI / DPT as specified; 100 % visual |
| Certification | EN 10204 3.1 as standard; 3.2 with third-party endorsement |
Applications & industries served
Available forms, sizes & range
Provide with your enquiry
- Product type and configuration.
- Run / branch or end sizes (NPS) and wall / schedule.
- Material grade, class and condition.
And the commercial detail
- Applicable standard and edition.
- Required tests and certification (3.1 / 3.2, PMI, NACE).
- Quantity and any drawing or BOQ.
Frequently asked questions
What is a split tee?
A split tee, also called a saddle or full-encirclement tee, is a branch fitting that fits around an existing run pipe to give a reinforced outlet, typically for a hot-tap or in-service branch connection. Full-encirclement types wrap the run completely; saddle types cover part of the circumference.
Do you carry out the hot-tap or line-stopping operation?
No. We supply the split tee / hot-tap fitting to the design specification. The in-service hot-tap, tapping and line-stopping operation is carried out by the qualified operator or contractor under their own procedures and the applicable code (for example API RP 2201), subject to operator approval and verified equipment compatibility.
How is the branch reinforced?
By the saddle or full-encirclement body design; where an integrally reinforced outlet is used, MSS SP-97 outlets apply. The branch is assessed for pressure and external loads against the pipeline design.
Is the run (host) pipe supplied with the fitting?
No. The existing run pipe is an input to the design, not part of the fitting supply. We need the run outside diameter, wall or schedule, grade and design conditions to supply a matching split tee.
Which grades and standards apply?
Carbon, high-yield (A860 WPHY), alloy, stainless, duplex and nickel grades, confirmed per order; body to ASME B16.9 and MSS SP-75 with MSS SP-97 outlets where used, and NACE MR0175 / ISO 15156 for sour service where specified.
What documentation is provided?
EN 10204 3.1 as standard and 3.2 with third-party endorsement, plus PMI, NDE and dimensional records as specified on the order.
Request a quote
Send your requirement to Sagiant Piping Industries and our team responds with grade, material selection, availability and pricing for split tee. Attach a BOQ, line list or drawing for a faster, more accurate quotation.
- Fast RFQ response with grade & material-selection support
- EN 10204 3.1 / 3.2 certification, PMI & third-party inspection
- BOQ & line-list project supply — India & export
Mechanical & chemical values shown are ASTM/ASME specification figures; certified heat-specific values appear on the MTC. Availability is confirmed with the quotation.
