Introduction to Flanged Lapped Ferrule Flange

A slip-on flange with a flat welding ring is a movable flange that is directly connected to pipes and equipment in engineering projects using bolts.

The difference between a flat weld ring loose flange and a socket weld ring loose flange is that one has a flange ring and the other has a rolled edge. Both are called loose flanges. Choose the appropriate loose flange according to the requirements of pipeline construction; loose flanges are also known as slip-on flanges.

Characteristics of Flat Weld Ring Flanged Connection

The loose-lug flange, commonly used on pipelines, allows for easy rotation of both sides of the pipes by loosening the bolts, making it convenient for assembly and disassembly.

Specification Model

DN15-DN600

Pressure Grade

PN6~PN16

Common Materials

Carbon Steel: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70

Stainless Steel: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8

Alloy Steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ

Execution Standard

Chemical Industry Steel Pipe Flange: HG/T20592-2009

Flanged Plate Type Loose-Fitting Steel Pipe Flanges: GB/T9121-2010

Procurement Recommendations

1: It's recommended to purchase from a legitimate flange manufacturer with a certain production scale.

2: Manufacturers of flanges need to provide material inspection reports and related documents for loose fit flanges.

3: The loose flange must have corresponding specification model embossing and marking.