On July 7, 2025, our long-standing client once again sent us a quotation request. The products in the quotation request were carbon and stainless steel butt weld fittings. The butt weld fittings in this quotation request covered a variety of specifications, with the main types including elbows, tees, and reducers. We promptly compiled a detailed quotation and technical documentation based on their requirements, and, drawing on our previous collaboration experience, recommended a product solution offering better cost-effectiveness and more stable delivery times, which received positive feedback from the client.
Part of the product list is as follows
| ITEM | Product | Description | Quantity | Unit |
| 1 | Tee | ASTM A403 Gr.WP316L BW ASME B16.9 SCH80S | 12 | piece |
| 2 | Tee | ASTM A234 Gr.WPB BW ASME B16.9 SCH160 | 6 | piece |
| 3 | Tee | ASTM A234 Gr.WPB BW ASME B16.9 SCH80 | 6 | piece |
| 4 | Tee | ASTM A234 Gr.WPB BW ASME B16.9 XXS | 8 | piece |
| 5 | Tee | ASTM A403 Gr.WP316L BW ASME B16.9 SCH80S×SCH80S | 18 | piece |
| 6 | 90°Elbow | ASTM A403 Gr.WP316L ASME B16.9 SCH80S | 18 | piece |
| 7 | 90°Elbow | ASTM A403 Gr.WP316L ASME B16.9 SCH80S | 14 | piece |
| 8 | 90°Elbow | ASTM A403 Gr.WP316L ASME B16.9 SCH80S | 48 | piece |
| 9 | 90°Elbow | ASTM A403 Gr.WP316L ASME B16.9 SCH80S | 36 | piece |
| 10 | Concentric Reducer | ASTM A403 Gr.WP316L ASME B16.9 SCH80S×SCH80S | 6 | piece |
| 11 | Concentric Reducer | ASTM A403 Gr.WP316L ASME B16.9 SCH40S×SCH80S | 6 | piece |
| 12 | Concentric Reducer | ASTM A234 Gr.WPB ASME B16.9 SCH160×SCH160 | 6 | piece |
Inspection Photos
Butt Weld Fittings Specification
| Size: | 1/2 to 80 Inch / DN15 — DN2000 |
| Thickness: | Sch 10s, 20, STD, 40, 80, 160, XXS |
| Carbon Steel: | ASTM A234 WPB, A860 WPHY42, WHPY52, WPHY60, WHPY65, WPHY70. |
| Low Temp Carbon Steel: | ASTM A420 WPL3,WPL6, WPL9 |
| Stainless Steel: | A403 WP304, WP316, WP317, WP321, WP310 |
| Alloy Steel: | A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
| Duplex Steel: | S 31803, S 32205, S 32550, S 32750, S32760 |
ASTM A234 WPB Butt Weld Fittings Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | Cb | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | |||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | / | 0.08 |
ASTM A234 WPB Butt Weld Fittings Mechanical Property
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % | HARDNESS |
| ASTM A234 WPB | 415 min | 240 min | 22 min | 30 min | 197 max |
Advantages of Carbon Steel Butt Weld Fittings
Low cost: Compared with stainless steel, carbon steel raw materials are less expensive, making them the preferred choice for projects with limited budgets.
High strength: Can withstand high pressure and is widely used in high-pressure pipeline systems for petroleum, natural gas, and chemical industries.
Easy to weld: Carbon steel has good weldability and is easy to install and repair on site.
ASTM A403 WP316L Stainless Steel Fittings Chemical Composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr |
| ASTM A403 WP316 | MIN | 10.0 | 16.0 | |||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | |
| ASTM A403 WP316L | MIN | 10.00 | 16.00 | |||||
| MAX | 0.03 | 2.00 | 0.05 | 0.03 | 1.00 | 14.00 | 18.00 |
ASTM A403 WP316L Stainless Steel Fittings Mechanical Property
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % |
| ASTM A403 WP316 | 515 min | 205 min | 28 min |
| ASTM A403 WP316L | 485 min | 170 min | 28 min |
Advantages of Stainless Steel Butt Weld Fittings:
Strong corrosion resistance: Resistant to corrosion from a variety of chemical media, no additional anti-corrosion treatment required.
Aesthetic appeal: Stainless steel has a smooth surface, requires no painting, is easy to clean, and is suitable for industries with high hygiene and appearance requirements.
High temperature resistance: Maintains good mechanical properties even in high temperature environments.
Butt Weld 90 Degree Elbow Dimensions
| DN | NPS | OD | A | |
| LR | SR | |||
| 15 | 1/2 | 21.3 | 38 | 25 |
| 20 | 3/4 | 26.7 | 38 | 25 |
| 25 | 1 | 33.4 | 38 | 25 |
| 32 | 1-1/4 | 42.2 | 48 | 32 |
| 40 | 1-1/2 | 48.3 | 57 | 38 |
| 50 | 2 | 60.3 | 76 | 51 |
| 65 | 2-1/2 | 73.0 | 95 | 64 |
| 80 | 3 | 88.9 | 114 | 76 |
| 90 | 3-1/2 | 101.6 | 133 | 89 |
| 100 | 4 | 114.3 | 152 | 102 |
| 125 | 5 | 141.3 | 190 | 127 |
| 150 | 6 | 168.3 | 229 | 152 |
| 200 | 8 | 219.1 | 305 | 203 |
| 250 | 10 | 273.0 | 381 | 254 |
| 300 | 12 | 323.8 | 457 | 305 |
| 350 | 14 | 355.6 | 533 | 356 |
| 550 | 22 | 559.0 | 838 | 559 |
| 600 | 24 | 610.0 | 914 | 610 |
| 650 | 26 | 660.0 | 991 | 660 |
| 700 | 28 | 711.0 | 1067 | 711 |
| 750 | 30 | 762.0 | 1143 | 762 |
| 800 | 32 | 813.0 | 1219 | 813 |
| 850 | 34 | 864.0 | 1295 | 864 |
| 900 | 36 | 914.0 | 1372 | 914 |
| 950 | 38 | 965.0 | 1447 | 965 |
| 1000 | 40 | 1016.0 | 1524 | 1016 |
| 1050 | 42 | 1067.0 | 1600 | 1067 |
| 1100 | 44 | 1118.0 | 1676 | 1118 |
| 1150 | 46 | 1168.0 | 1753 | 1168 |
| 1200 | 48 | 1219.0 | 1829 | 1219 |
| 1300 | 52 | 1321.0 | 1981 | 1321 |
| 1400 | 56 | 1422.0 | 2134 | 1422 |
| 1500 | 60 | 1524.0 | 2286 | 1524 |
| 1600 | 64 | 1626.0 | 2438 | 1626 |
| 1700 | 68 | 1727.0 | 2591 | 1727 |
| 1800 | 72 | 1829.0 | 2743 | 1829 |
| 1900 | 76 | 1930.0 | 2896 | 1930 |
| 2000 | 80 | 2032.0 | 3048 | 2032 |
Butt Weld Tee Dimensions
| Nominal Size | Outside Diameter at Bevel | Center to End | ||
| DN | NPS | OD1×OD2 | C | M |
| 15 | 1/2 | 21.3 | 25 | 25 |
| 20 | 3/4 | 26.7 | 29 | 29 |
| 25 | 1 | 33.4 | 38 | 38 |
| 32 | 11/4 | 42.2 | 48 | 48 |
| 40 | 11/2 | 48.3 | 57 | 57 |
| 50 | 2 | 60.3 | 64 | 64 |
| 65 | 21/2 | 73.0 | 76 | 76 |
| 80 | 3 | 88.9 | 86 | 86 |
| 90 | 31/2 | 101.6 | 95 | 95 |
| 100 | 4 | 114.3 | 105 | 105 |
| 125 | 5 | 141.3 | 124 | 124 |
| 150 | 6 | 168.3 | 143 | 143 |
| 200 | 8 | 219.1 | 178 | 178 |
| 250 | 10 | 273.0 | 216 | 216 |
| 300 | 12 | 323.8 | 254 | 254 |
| 350 | 14 | 355.6 | 279 | 279 |
| 400 | 16 | 406.4 | 305 | 305 |
| 450 | 18 | 457.0 | 343 | 343 |
| 500 | 20 | 508.0 | 381 | 381 |
| 550 | 22 | 559.0 | 419 | 419 |
| 600 | 24 | 610.0 | 432 | 432 |
| 650 | 26 | 660.0 | 495 | 495 |
| 700 | 28 | 711.0 | 521 | 521 |
| 750 | 30 | 762.0 | 559 | 559 |
| 800 | 32 | 813.0 | 597 | 597 |
| 850 | 34 | 864.0 | 635 | 635 |
| 900 | 36 | 914.0 | 673 | 673 |
| 950 | 38 | 965.0 | 711 | 711 |
| 1000 | 40 | 1016.0 | 749 | 749 |
| 1050 | 42 | 1067.0 | 762 | 711 |
| 1100 | 44 | 1118.0 | 813 | 762 |
| 1150 | 46 | 1168.0 | 851 | 800 |
| 1200 | 48 | 1219.0 | 889 | 838 |
| 1300 | 52 | 1321.0 | 965 | 914 |
| 1400 | 56 | 1422.0 | 1041 | 965 |
| 1600 | 64 | 1626.0 | 1194 | 1092 |
| 1700 | 68 | 1727.0 | 1270 | 1168 |
| 1800 | 72 | 1829.0 | 1320 | 1245 |
| 1900 | 76 | 1930.0 | 1422 | 1320 |
| 2000 | 80 | 2032.0 | 1499 | 1397 |
Butt Weld Concentric Reducer Dimensions
| OD1 | OD2 | END TO END |
| NPS | NPS | H |
| 3/4 | 3/8 – 1/2 | 38 |
| 1 | 1/2 – 3/4 | 51 |
| 1 1/4 | 1/2 – 1 | 51 |
| 1 1/2 | 1/2 – 1 1/4 | 64 |
| 2 | 3/4 – 1 1/2 | 76 |
| 2 1/2 | 1 – 2 | 89 |
| 3 | 1 1/4 – 2 1/2 | 102 |
| 4 | 2 – 3 1/2 | 102 |
| 5 | 2 – 4 | 127 |
| 6 | 2 1/2 – 5 | 140 |
| 8 | 3 1/2 – 6 | 152 |
| 10 | 4 – 8 | 178 |
| 12 | 5 – 10 | 203 |
| 14 | 6 – 12 | 330 |
| 16 | 6 – 14 | 356 |
| 18 | 8 – 16 | 381 |
| 20 | 10 – 18 | 508 |
| 22 | 12 – 20 | 508 |
| 24 | 12 – 22 | 508 |
| 26 | 12 – 24 | 610 |
| 28 | 14 – 26 | 610 |
| 30 | 14 – 28 | 610 |
| 32 | 20 – 30 | 610 |
| 34 | 22 – 32 | 610 |
| 36 | 22 – 34 | 610 |
| 38 | 24 – 36 | 610 |
| 40 | 28 – 38 | 610 |
| 42 | 28 – 40 | 610 |
| 44 | 32 – 42 | 610 |
| 46 | 34 – 44 | 711 |
| 48 | 36 – 46 | 711 |
| 52 | 40 – 48 | 711 |
| 56 | 40 – 52 | 711 |
| 60 | 44 – 56 | 711 |
How to choose
Carbon steel and stainless steel butt weld fittings each have their own advantages and disadvantages. When choosing, you should weigh the specific needs of the project:
If the project medium is non-corrosive, the budget is limited, and there are no special requirements for aesthetics, carbon steel butt weld fittings are an economical and practical choice.
If the project medium is corrosive, there are high requirements for hygiene and aesthetics, or it needs to withstand harsh environmental conditions, stainless steel butt weld fittings are a more reliable and safer option.