Introduction
Medium and low pressure pipe fittings flanges are essential components in industrial piping systems, providing reliable connections that can be easily assembled and disassembled. For procurement engineers and industrial buyers, understanding the design, manufacturing, and quality control aspects is critical to ensuring long-term system integrity. This guide focuses on butt-weld fittings and flanges used in moderate pressure and temperature services, offering practical insights for informed sourcing.
What Are Medium and Low Pressure Pipe Fittings Flanges?
Flanges and butt-weld fittings connect pipe sections and equipment, forming a sealed system. Medium and low pressure applications typically operate at pressures up to Class 300 (PN 16–50) and temperatures below 400°C. Butt-weld fittings are welded directly to pipes, providing a strong, leak-resistant joint. Common types include elbows, tees, reducers, and caps. Flanges are available in various facing types (e.g., raised face, flat face) and sealing designs to match gasket requirements.
Materials and Standards to Confirm
When specifying flanges and fittings, confirm the material grade and applicable standard. Typical materials include:



