Threaded Cross
What is a Threaded Cross?
A Threaded Cross is a four-way pipe fitting with one inlet and three outlets (or vice versa), each with female threads. It’s used to create multi-directional branches in a piping network. These fittings are ideal for complex layouts in chemical plants, process skids, compressed air systems, and fluid control panels.
Threaded crosses simplify the design of compact piping arrangements where multiple lines intersect.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | ½” to 4″ (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | Threaded Cross | Equal, Reducing |
| Material Options | Carbon Steel | ASTM A105, ASTM A350 LF2 |
| Stainless Steel | ASTM A182 F304, F316, F321 | |
| Alloy Steel | ASTM A182 F5, F9, F11, F22 | |
| Other Alloys | Monel, Inconel, Titanium | |
| Standards & Certifications | ASTM | ASTM A105, ASTM A182 |
| ASME / ANSI | ASME B16.11, ANSI B16.11 | |
| MSS | MSS SP-79, MSS SP-83 | |
| European Standards | EN 10222, EN 10204 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marked | |
| Design Features | Wall Thickness | Schedule 40, Schedule 80, Schedule 160 |
| End Connections | Threaded (NPT, BSP, BSPT, PT) | |
| Pressure Class | 2000#, 3000#, 6000#, 9000# | |
| Tolerance | Thread Tolerance | As per ASME B1.1, ISO 7-1 |
| Coating & Surface Finish | Anti-Corrosion Coating | Zinc Plated, Hot Dip Galvanized, Stainless Steel Finish |
| Surface Finish | Mill Finish, Pickled, Polished, Bead Blasted | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Radiography (RT), Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPT) | |
| Destructive Testing | Tensile, Hardness, Impact, Elongation |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Wall Thickness (Schedule) | Length (L) | End Connections | Weight per Piece |
|---|---|---|---|---|---|---|
| Threaded Cross (Equal) | ½” | 21.3 mm | Schedule 40, Schedule 80 | 75 mm | Threaded (NPT, BSP, BSPT, PT) | 400g |
| Threaded Cross (Equal) | ¾” | 26.7 mm | Schedule 40, Schedule 80 | 85 mm | Threaded (NPT, BSP, BSPT, PT) | 500g |
| Threaded Cross (Equal) | 1″ | 33.4 mm | Schedule 40, Schedule 80 | 100 mm | Threaded (NPT, BSP, BSPT, PT) | 600g |
| Threaded Cross (Equal) | 1½” | 48.3 mm | Schedule 40, Schedule 80 | 120 mm | Threaded (NPT, BSP, BSPT, PT) | 900g |
| Threaded Cross (Equal) | 2″ | 60.3 mm | Schedule 40, Schedule 80 | 130 mm | Threaded (NPT, BSP, BSPT, PT) | 1.2kg |
| Threaded Cross (Equal) | 2½” | 73.0 mm | Schedule 40, Schedule 80 | 150 mm | Threaded (NPT, BSP, BSPT, PT) | 1.5kg |
| Threaded Cross (Equal) | 3″ | 88.9 mm | Schedule 40, Schedule 80 | 160 mm | Threaded (NPT, BSP, BSPT, PT) | 2.0kg |
| Threaded Cross (Equal) | 4″ | 114.3 mm | Schedule 40, Schedule 80 | 180 mm | Threaded (NPT, BSP, BSPT, PT) | 2.5kg |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ (Carbon Steel), 7.9 – 8.0 g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent (SS > CS > Alloy Steel) | – |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Serrated / Stock / Smooth finish per ASME B16.11 | – |
| Threading Type | Threaded Connection (NPT, BSP, BSPT, PT) | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.11 |
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 – 0.35 |
| Manganese (Mn) | 0.60 – 1.65 |
| Silicon (Si) | 0.15 – 0.80 |
| Chromium (Cr) | 18.0 – 20.0 (Stainless Steel) |
| Nickel (Ni) | 8.0 – 10.5 (SS 304/316) |
| Molybdenum (Mo) | 2.0 – 3.0 (for F316 only) |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
Applications of Threaded Cross
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
When should a threaded cross be used?
Are reducing crosses available?
Can these be used in high-temperature applications?
Are threaded crosses tested for leakage and pressure?
