Equal Cross (Straight Cross) fittings are ideal where four pipes of the same diameter meet at one point, ensuring balanced flow and structural reliability. For systems requiring a transition between different pipe sizes, our Reducing Cross (Unequal Cross) provides a reliable and efficient solution.
Buttweld Cross
Cross : Specifications | Materials | Types | Dimensions | Weight Chart | Tolerances | FAQ
ASME B16.9 Equal Cross, Unequal Cross Manufacturer & Exporter – Delivering High-Quality Stainless Steel, Carbon Steel, Alloy Steel, and High Nickel Alloy Straight Crosses (Seamless & Welded, SCH 40 / SCH 80) to the UK, Canada, Singapore, Saudi Arabia, and Brazil.
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a trusted name in the global piping industry, specializing in high-quality ASME B16.9 Buttweld Cross fittings. Manufactured with precision from premium materials such as Stainless Steel, Carbon Steel, Alloy Steel, and High Nickel Alloys, our buttweld crosses deliver exceptional strength, durability, and leak-proof performance. Available in Seamless (½″ NB to 24″ NB) and Welded (up to 48″ NB) options, we cater to diverse industries including oil & gas, petrochemicals, power generation, and water treatment.
We offer Lateral Cross fittings, with branch outlets positioned at angles (commonly 45°) to the main run, making them ideal for reducing turbulence and optimizing flow in specialized piping layouts.
At Midland Forge we understand that every project demands precision and reliability. That’s why all our buttweld cross fittings comply with ASME B16.9 standards, undergo strict dimensional and pressure testing, and are available in multiple schedules including SCH 40, SCH 80, and higher as per client requirements. With a proven track record of supplying to over 30 countries—including Germany, Australia, UAE, South Africa, and the USA—we are committed to delivering unmatched quality, competitive pricing, and on-time deliveries for projects of every scale.
ASME B16.9 Cross Fittings
Straight Cross Specifications, Sizes & Standards
ASME B16.9 / MSS-SP-43
Buttweld Reducing Cross – Materials, Grades & Standards
| Material Category | Grade | Standards (ASTM / ASME) | Typical Use/Application |
|---|---|---|---|
| Stainless Steel | 304 / 304L / 304H | ASTM A403 WP304/304L/304H | General purpose, corrosion resistance |
| 316 / 316L / 316H | ASTM A403 WP316/316L/316H | Marine & chemical applications | |
| 317 / 317L | ASTM A403 WP317/317L | High corrosion resistance | |
| 321 / 321H | ASTM A403 WP321/321H | High temperature, stabilized | |
| 347 / 347H | ASTM A403 WP347/347H | High-temp pressure systems | |
| 904L | ASTM A403 WP904L / B625 | Acid handling, sulfuric environments | |
| 254 SMO | ASTM A403 / B366 | High chloride environments | |
| Carbon Steel | A234 WPB / WPC | ASTM A234 | Pressure piping & general piping systems |
| A420 WPL6 | ASTM A420 | Low temperature services | |
| Alloy Steel | A234 WP1 / WP5 / WP9 | ASTM A234 | High-temp & pressure pipelines |
| A234 WP11 / WP22 | ASTM A234 | Steam lines & refineries | |
| A234 WP91 | ASTM A234 | Power generation, high performance | |
| Duplex Steel | UNS S31803 / S32205 | ASTM A815 / A790 | Corrosion & high strength use |
| Super Duplex Steel | UNS S32750 / S32760 | ASTM A815 / A790 | Offshore, seawater applications |
| Nickel Alloys | Nickel 200 / 201 | ASTM B366 / B162 | Alkali & chemical processing |
| Inconel 600 / 625 / 718 | ASTM B366 | Heat exchangers, aerospace | |
| Incoloy 800 / 825 | ASTM B366 | Petrochemical & chemical processing | |
| Hastelloy C22 / C276 | ASTM B366 | Severe corrosion resistance | |
| Monel 400 / K500 | ASTM B366 | Seawater, chemical industries | |
| Alloy 20 | ASTM B366 | Sulfuric acid services | |
| Nimonic 75 / 80A | ASTM B366 / B637 | High-temp applications | |
| Copper Nickel | Cu-Ni 90/10 / 70/30 | ASTM B466 / B467 | Marine systems, seawater service |
| Titanium | Grade 2 / Grade 5 | ASTM B363 | Lightweight, corrosion resistance |
| Aluminium | 6061 / 5083 | ASTM B361 | Low-pressure, non-corrosive piping |
Dimensions of Buttweld Cross Fittings
| NPS (inches) | OD (D) mm | Equal Cross – Center to End (C) mm | Equal Cross – Center to End (M) mm | Unequal Cross – Run OD (D1) mm | Unequal Cross – Branch OD (D2) mm | Unequal Cross – Center to End (C1) mm | Unequal Cross – Center to End (M1) mm |
|---|---|---|---|---|---|---|---|
| 1/2 | 21.3 | 25 | 25 | 21.3 | 15 | 25 | 25 |
| 3/4 | 26.7 | 29 | 29 | 26.7 | 21.3 | 29 | 29 |
| 1 | 33.4 | 38 | 38 | 33.4 | 26.7 | 38 | 38 |
| 1 1/2 | 48.3 | 57 | 57 | 48.3 | 33.4 | 57 | 57 |
| 2 | 60.3 | 64 | 64 | 60.3 | 48.3 | 64 | 64 |
| 3 | 88.9 | 86 | 86 | 88.9 | 60.3 | 86 | 86 |
| 4 | 114.3 | 105 | 105 | 114.3 | 88.9 | 105 | 105 |
| 6 | 168.3 | 140 | 140 | 168.3 | 114.3 | 140 | 140 |
| 8 | 219.1 | 178 | 178 | 219.1 | 168.3 | 178 | 178 |
| 10 | 273 | 216 | 216 | 273 | 219.1 | 216 | 216 |
| 12 | 323.9 | 254 | 254 | 323.9 | 273 | 254 | 254 |
Weight Chart: ASME B16.9 Cross (SCH 40 / STD)
| NPS | OD | Sch 40 Equal Cross (kg) | Sch 40 Reducing Cross (kg) | Sch 80 Equal Cross (kg) | Sch 80 Reducing Cross (kg) |
|---|---|---|---|---|---|
| 1/2″ | 21.3 | 0.18 | 0.17 | 0.21 | 0.20 |
| 3/4″ | 26.7 | 0.28 | 0.26 | 0.33 | 0.31 |
| 1″ | 33.4 | 0.50 | 0.47 | 0.58 | 0.55 |
| 1 1/4″ | 42.2 | 0.82 | 0.78 | 0.96 | 0.91 |
| 1 1/2″ | 48.3 | 1.10 | 1.05 | 1.30 | 1.24 |
| 2″ | 60.3 | 1.88 | 1.79 | 2.20 | 2.09 |
| 2 1/2″ | 73.0 | 3.20 | 3.04 | 3.74 | 3.55 |
| 3″ | 88.9 | 4.70 | 4.46 | 5.40 | 5.13 |
| 3″ | 88.9 | — | 4.20 | — | 4.80 |
| 4″ | 114.3 | 7.50 | 7.13 | 8.80 | 8.36 |
| 4″ | 114.3 | — | 6.90 | — | 8.10 |
| 5″ | 141.3 | 11.00 | 10.45 | 13.20 | 12.54 |
| 5″ | 141.3 | — | 10.10 | — | 12.20 |
| 6″ | 168.3 | 15.00 | 14.25 | 18.20 | 17.29 |
| 6″ | 168.3 | — | 13.90 | — | 16.80 |
| 8″ | 219.1 | 28.00 | 26.60 | 34.00 | 32.30 |
| 8″ | 219.1 | — | 25.90 | — | 31.40 |
| 10″ | 273.0 | 44.00 | 41.80 | 53.00 | 50.35 |
| 10″ | 273.0 | — | 40.70 | — | 49.10 |
| 12″ | 323.8 | 64.00 | 60.80 | 77.00 | 73.15 |
| 12″ | 323.8 | — | 59.30 | — | 71.40 |
Buttweld Cross Tolerances as per ASME B16.9
| Fitting Type | Parameter | Tolerance | |
|---|---|---|---|
| Up to 4” NPS | Above 4” NPS | ||
| Equal Cross, Unequal Cross, Lateral Cross | Outside Diameter at Bevel | ±1.6 mm (1/16″) | ±1.6 mm (1/16″) |
| Center-to-End (A, B) | ±1.6 mm (1/16″) | ±3.2 mm (1/8″) | |
| Wall Thickness | -12.5% (no positive tolerance) | ||
| Ovality | Shall not exceed 1% of specified OD | ||
What is the function of a Buttweld Cross in a piping system?
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Four-Way Branch Connection – A Buttweld Cross has one inlet and three outlets (or vice versa), allowing the creation of a four-way connection in a piping network.
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Flow Distribution – It enables the distribution of fluid, gas, or slurry from a single source to multiple directions.
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Flow Combination – It can also be used to merge flows from different pipelines into one main line.
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System Integration – Commonly used in complex piping layouts where multiple lines need to be interconnected.
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Pressure & Flow Control – By allowing multiple connection points, it helps in balancing pressure and controlling the flow between interconnected lines.
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Seamless Flow Path – The buttweld joint provides a smooth inner surface, reducing turbulence and pressure drop.
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Suitable for High-Pressure Systems – Designed to withstand high pressures and temperatures, making it suitable for industrial applications such as oil & gas, chemical, and power plants.
How does welding a Buttweld Cross affect pipeline integrity?
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Permanent Connection – Butt welding fuses the cross and the pipe into a single, continuous metal structure, eliminating mechanical joints that can loosen over time.
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Leak-Proof Joint – The weld creates a fully sealed connection, preventing leakage under high pressure or temperature.
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High Structural Strength – The joint maintains the same or higher strength as the parent pipe, making it ideal for critical service.
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Smooth Internal Bore – Proper butt welding ensures no internal steps or gaps, reducing turbulence, erosion, and pressure drop.
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Resistance to Mechanical Stress – A welded joint distributes stresses evenly, minimizing weak points in the pipeline.
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Corrosion Resistance – When correctly welded and post-treated, the joint has the same corrosion resistance as the base material.
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Suitable for Harsh Conditions – The strength and durability make it reliable for high-pressure, high-temperature, or cyclic-load environments.
What are the common inspection and testing requirements?
Visual Examination (VT):
- The simplest and most basic form of inspection.
- Checks for obvious surface defects such as cracks, porosity, misalignment, or incorrect dimensions.
- Usually performed before and after welding or fabrication.
2. Dimensional Inspection:
- Ensures the component meets the specified dimensions, tolerances, and geometry.
- Tools such as calipers, micrometers, gauges, and templates are commonly used.
- Critical for fittings like elbows, tees, and flanges to ensure proper fit-up in piping systems.
3. Hydrostatic Testing (Pressure Test):
- The component is filled with water (or another incompressible fluid) and pressurized to a level above the operating pressure.
- Detects leaks, weak welds, or structural weaknesses.
- Confirms the system can safely operate under specified pressure conditions.
4. Non-Destructive Testing (NDT):
These methods check internal and surface integrity without damaging the component:
- Radiographic Testing (RT): Uses X-rays or gamma rays to detect internal flaws like voids, inclusions, or incomplete fusion in welds.
- Ultrasonic Testing (UT): Uses high-frequency sound waves to detect internal discontinuities or measure wall thickness.
- Magnetic Particle Testing (MPT/MT): Detects surface and near-surface cracks in ferromagnetic materials.
- Dye Penetrant Testing (DPT/PT): Reveals surface cracks and porosity in non-porous metals.
5. Material Verification and Certification:
- Confirms chemical composition and mechanical properties of the material.
- Often done through Mill Test Reports (MTRs) or Positive Material Identification (PMI).
6. Weld Examination:
- Checks for proper weld profile, penetration, and alignment.
- May include a combination of visual, radiographic, or ultrasonic inspection.
Countries we export Buttweld Cross
United Arab Emirates (UAE), Saudi Arabia, Oman, Qatar, Kuwait, Bahrain, Iraq, Jordan, Lebanon, Yemen, Iran, Israel, Germany, United Kingdom (UK), Italy, France, Spain, Netherlands, Myanmar, Singapore, Malaysia, Indonesia, Vietnam, South Korea, Philippines, Thailand, Bangladesh, Sri Lanka, Papua New Guinea, United States (USA), Canada, Brazil, Chile, Argentina, Colombia, Russia, Ukraine, Kazakhstan, Poland, Egypt, Algeria, Morocco, Tunisia, Libya, Nigeria, Ghana, Ivory Coast, Senegal, Cameroon, Gabon, Democratic Republic of Congo, Kenya, Tanzania, Uganda, Ethiopia, Rwanda, Zambia, South Africa, Mozambique, Namibia, Botswana