1. Home
  2. Products
  3. Alloy Steel Flange
  4. Lap Joint Flange / Stub End

Lap Joint Flange / Stub End

  •  Lap Joint Flange / Stub End
  •  Lap Joint Flange / Stub End
  •  Lap Joint Flange / Stub End
  •  Lap Joint Flange / Stub End
Production Range
Type Nominal diameter Pressure
Flange America standard 1/2"~100" DN15-DN2500 Class150~Class2500
Flange Europe standard 1/2"~100" DN15-DN2500 PN2.5~PN400
Commonly Used Materials
Austenitic stainless steel Super duplex stainless steel Nickel-based alloy steel Carbon steel/alloy steel Other materials
304 304L 304H 304LN S31803 S32205 N10276 N04400 N06600 Q235 20# 20G TA1 TA2 TA3 TC1~TC9
316 316L 316H 316Ti S32304 S32760 N06600 N06625 N06690 WPB A105 16Mn LF2 LF3 LF5 LF6 LF10
310S 321 321H 347 S32550 S32750 N08800 N08825 N08904 45# 15CrMo Al, Ti, martensite
S31254 S33400 N08020 N08810 N08811 A350LF2 A420Gr.WPL6

Loose ring flange comes in two pieces: the center collar and the outer ring. It is designed to connect industrial pipelines and equipment with bolts.

Loose ring flange helps users to save the material considerably: the ring is made from low-grade material, and the center collar adopts the material the same with the pipe. Loose plate flangefeatures limited bearing capacity, and low strength in the ring, so users are suggested to apply it for some specific applications.

Manufacturing Technique
Loose ring flanges are produced with die stamping and machining techniques. Welding or casting treatment is unacceptable.

Quality Commitment
At Yuanyang, quality is our first priority. We purchase the raw materials only from well-known brands, and have set strict inspection procedures in the production line. Materials are marked with different colors so that they are easily distinguished; and 100% spectral detection is conducted for all of the finished fittings before shipping.

Inquiry Form
Other products