Oval Flange Flat Welding Face Brief Introduction

Oval and concave-convex flat welding flanges are a type of non-standard flange product. Generally, oval and concave flanges are connected using the WN type with neck welding flange and the SO type with neck flat welding flange. The choice of flat welding flange types with oval and concave sealing is rare, thus they belong to the category of non-standard and customized flanges.

Oval and concave-convex flat flanges are used together; one sealing surface is concave and the other is convex.

Features of Concave-Convex Welding Flange

Due to the characteristics of its sealing surface and its smaller space occupancy, a concave-convex flange is selected, which will offer better sealing performance than a standard RF raised face flange.

Sealing Surface Type

Concave-convex (FM), Concave (F), Convex (M).

Common Materials

Carbon steel, alloy steel, stainless steel.

Connection Type

Single-sided welding, with concave and convex surfaces matched for use, followed by bolt tightening.

Procurement Recommendations

1: It is recommended to purchase from a reputable flange manufacturer, which should have a certain production scale.

2: manufacturers of flange need to ensure the dimensions of the concave and convex flange meet the customer's requirements and the sealing requirements of the flange.

3: The concave-convex flange requires special packaging during transportation to prevent severe dents and ensure effective sealing.