SA105N ASME B16.5 Flanges Shipped for Singapore Piping Project

Haihao Group has completed packing and shipment of a mixed package of carbon steel flanges for a long-term partner based in Singapore. This order covers a broad range of flange types, pressure classes and sizes, prepared to match the layout requirements of on-site piping isolation and connection work.

The core of this batch is SA105N ASME B16.5 flanges. We produced blind flanges, weld neck flanges, slip-on flanges and socket weld flanges from SA105N forged carbon steel, with raised face and flat face options to suit different gasket selections. Sizes span from 1/2 inch up to 24 inch, covering Class 150, Class 300 and Class 600 pressure ratings. Large diameter blind flanges follow ASME B16.47 Series A and Series B, extending the flange coverage up to 32 inch for the project’s large-bore lines.

SA105N ASME B16.5 blind flange, weld neck flange, slip on flange and spectacle blind flange for Singapore project, black painted

Apart from standard SA105N ASME B16.5 flanges, this shipment also includes spectacle blind flanges built to ASME B16.48, using SA516 70N plate material. These figure 8 blinds are critical for safe line isolation during routine inspection and shutdown, supplied in Class 150 and Class 300 from 1 inch to 8 inch. All flanges receive black paint surface treatment after machining, to offer basic protection against rust during sea transit and outdoor storage in Singapore’s humid climate.

One practical point we focused on for this Singapore project was consistency across mixed pressure classes. Many local EPC teams prefer to source all isolation and connecting flanges from one supplier to avoid mismatched drilling, face finish and dimension tolerance. Our workshop arranged separate inspection tracks for ASME B16.5, B16.47 and B16.48 items, so every piece can be traced by heat number and test record before packing.

If you are sourcing SA105N ASME B16.5 flanges for oil, gas, chemical or water piping systems in Southeast Asia, we can quote combined packages of blind, WN, SO and spectacle blinds with full material test certificates. We hold stable stock for common sizes and can schedule fast production for large diameter or non-standard thickness requirements.