Collar

Collar is also called stub end is used in place of welded flanges where rotating back up flanges are desired. Using collar allows sections of the line to be opened for cleaning, inspection, or quick replacement etc, without the need to re-weld. Stub Ends are typically manufactured by two methods, Type A & Type B and are available in two standard lengths , long (ANSI) or short (MSS) pattern.

Technical Specifications:
Thicknesses are based on ASME B16.48 specifications or the products can be manufactured to customer specifications.
Standard surface finish is 125-250 RMS serrated finish. Other finishes available upon request.
c/w a standard shop primer on carbon steel products for rust inhibitor purposes.

Forming process: cold pressing

Manufacturing standard:
  • National standard: GB/T12459, GB/T13401, HG/T21635, HG/T21631
  • American standard: ASME/ANSI B16.9 MSS SP43
  • Japanese standard: JIS B 2311/2220
  • German standard: DIN2605/2616/2615/2617
  • Russian standard: GOST 17375/17376 and so on
  • Non-standard customized processing drawings are also acceptable 
















Pressure rating: SCH5S-SCH160; XXS
Material:
  • Stainless steel OCr18Ni9 grade, 0Cr18Ni9Ti, 1Cr18Ni9Ti;
  • 304, 304L, 316, 316L, 316Ti, 317, 317L, 321, 321H;
  • 1.4301, 1.4306, 1.4401, 1.4435, 1.4571, 1.4436, 1.4438, 1.4541;
  • 08X18H10(0X18H10), 03X18H11(000X18H11), 03X17H14M2 (000X17H13M2), 08X18H10T(0X18H10T) and so on
  • Dual phase stainless steel  A815-S31803、S32205、S32750、S32760
  • Super stainless steel ASTM 904L、B366-N08904、A403-WP317、317L、254SMO(UNS S31254)

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