FOUNDED IN 2013

From our founding by an experienced forging insider in the summer of 2013, Weldo Flange has grown to an industry leader you can trust.

OFFICE INFO

About us

PROVIDING ASME CODE & NON CODE INDUSTRIAL FLANGE

Zhejiang Weldo Piping Solution Co.,Ltd.has served the petrochemical, process, and waterworks industries for over 3 decades.

We provide ANSI, API, and AWWA pipe flanges in stainless steel , duplex steel , carbon steel  alloys, and chrome steel. Styles we offer include Weld Neck, Slip On, Blind, Threaded, Socket Weld, Lap Joint, Orifice Flanges, Ring, and custom flanges in sizes from 1/2″ to 203″. Pressure classes we offer include 75, 125, 150, 175, 250, 300, 350, 400, 600, 900, 1500, 2500, 5K, 10K, 15K, 20K. High Yield – Low Temp.

 

Weld Neck Flange

Our most frequently requested flange, the Weld Neck Flange features a neck extension and weld bevel. Provides a natural form connection ideal for larger, high-pressure applications.

Slip On Flange

A simple alternative to the Weld Neck flange, a Slip On Flange is designed to accept the pipe into the center/bore, allowing welding around the outer diameter of the pipe.

Blind Flange

Designed to cap off a line, a Blind Flange has no bore or inner diameter. They are often altered to include NPT threads or custom bore holes to function as hubless Slip On flanges.

Socket Weld / Counter Bore Flange

Sometimes referred to as Counter Bore flanges, the Socket Weld types have a socket to insert pipe when space limitations make Weld Neck flanges difficult to use.

Threaded / Companion Flange

Threaded or Companion Flanges contain a female NPT threaded center for connection to male threaded piping. These flanges are commonly implemented in reducing connections.

Lap Joint Flange

Lap Joint Flanges are intended to saddle over a stub end fitting. They feature an extended hub and a machined radius at the base of the flat face.

THE PARTS YOU NEED, WHEN YOU NEED THEM

We’re here to help with your flange needs. Weldo Flange has been in the business of precision flange manufacturing since 2013, and we’re confident we can help you find a solution more quickly, affordably, and with greater expertise than the competition. We’d love to learn more about your project today!

INDUSTRIAL FLANGES MANUFACTURED IN A VARIETY OF DIFFERENT MATERIAL GRADES

Though Weldo Flange is well known for  stainless steel or duplex steel flanges, we actually offer over a dozen different material grades.

The most popular material grades are made from stainless steel . Not only does Weldo Flange offer stainless  steel pipe flanges and flanged fittings, but we also supply duplex steel and carbon steel  flanges that are used for a wide range of projects. Plate flanges can be ordered both for waterworks and petrochemical applications. Bar flanges and Forged Spec flanges can also be made per the dimensions in our catalog.