② 应用场景页
Butt-Weld Pipe Fittings: A Practical Buyer's Guide
Four fittings cover 90% of pipeline projects. Sizes, materials, schedules and the quality checks that matter before you pay.
The Core FourElbow (90°/45°) changes direction; tee splits or combines flow; reducer connects different diameters; cap seals the line end.
Size & ScheduleDN15-1200 (NPS 1/2-48) in schedules SCH10 to SCH160. Long radius (1.5D) is the default; short radius (1D) only where space is tight.
Material SelectionCarbon steel A234 WPB is the workhorse; low-temp service takes A420 WPL6; corrosive media take A403 WP304/316L; duplex 2205 and 904L for chemical service.
Quality Checks Before PaymentWall thickness at the weld bevel, ovality, angle tolerance (90° +/-1°), and heat-number traceability on every certificate.
MOQ & PackingTypical MOQ 50 pcs per item for stock sizes; custom diameters quoted per drawing. Export packing: wooden crates with rust-proof paper.
| Fitting | Size Range | Standard |
|---|---|---|
| Elbow 90°/45° | DN15-1200 | ASME B16.9 |
| Tee (equal/reducing) | DN15-900 | ASME B16.9 |
| Reducer (con/ecc) | DN50x25-1200x900 | ASME B16.9 |
| Cap | DN15-1200 | ASME B16.9 |