Stub end is a kind of steel butt weld fitting serving as a lap joint in loose flange, which is commonly used in environment with low temperature and pressure, but strong corrosion. To be applied in highly-corrosive medium, the loose flange employs corrosion-resistant material for the stub end, which is the part that comes in direct contact with the medium. The left flange parts are made from low-grade material and are clamped firmly by the flange ring to realize a good sealing.

Many hot or cold forming techniques are applicable in producing die stamped or butt weld stub ends, like bending, extrusion, molding, and machining. The basic principle for choosing molding techniques is that it should do no harm to the fittings. Welding technique is required additionally for some large-caliber stub ends.

Quality Commitment
To ensure high product quality, Yuanyang has established an advanced testing center, which is consisted of several laboratories for specific detection activities. All of the production data and records are stored in an orderly way in the archive so we can check all of the information about any orders we have finished. The unqualified raw materials will be destroyed in no time.

Our company can provide stub end according to custom need materials like austenitic stainless steel, duplex stainless steel, carbon steel and alloy steel listed as follows:
304 stainless steel stub end
304L stainless steel stub end
304H stainless steel stub end
304LN austenitic stainless steel stub end
316 stainless steel stub end
316L stainless steel stub end
316H stainless steel stub end
316Ti stainless steel stub end
310S stainless steel stub end
321 stainless steel stub end
321H stainless steel stub end
347 stainless steel stub end
S31254 austenitic stainless steel stub end
S31803 duplex stainless steel stub end
S32205 duplex stainless steel stub end
S32304 duplex stainless steel stub end
S32760 duplex stainless steel stub end
S32550 duplex stainless steel stub end
S32750 duplex stainless steel stub end
S33400 stainless steel stub end
N10276 Nickel alloy stub end
N04400 Nickel alloy stub end
N06600 Nickel alloy stub end
N06625 Nickel alloy stub end
N06690 Nickel alloy stub end
N08800 Nickel alloy stub end
N08825 Nickel alloy stub end
N08904 Nickel alloy stub end
N08020 Nickel alloy stub end
N08810 Nickel alloy stub end
N08811 Nickel alloy stub end
Q235 carbon steel stub end
20# carbon steel stub end
20G carbon steel stub end
WPB carbon steel stub end
A105 carbon steel stub end
16Mn steel stub end
45# carbon steel stub end
15CrMo alloy steel stub end
A350 LF2 carbon steel stub end
A420 grade WPL6 carbon steel stub end
TA1 titanium stub end
TA2 titanium stub end
TA3 titanium stub end
TC1—TC9 titanium alloy stub end
LF2 alloy steel stub end
LF3 alloy steel stub end
LF5 alloy steel stub end
LF6 alloy steel stub end
LF10 alloy steel stub end
Martensite stainless steel stub end