Welwin Pipes & Fittings is a dynamic group, which was established over a decade ago to cater to growing demands of ASME B16.9 Buttweld Collar standards in Elbow, Tee, Cross, Reducers, Nipple , Coupling etc in all materials like Stainless Steel , Carbon Steel & High Nickel Alloys. We Manufacture, Export and Supply Buttweld Fittings which meets with national and international quality standards and producing base which owns equipments conforming to international technical level and is well equipped with a whole set of advanced plasma refining equipments. We manufacture all 3 groups of Fittings such as Buttweld (BW) fittings, Socket Weld (SW) fittings & Threaded (THD) fittings as per ASME B16.11 standards & other International standards. We export our high quality ASME B16.9 Buttweld Collar to Kuwait, Egypt and Qatar.
Sizes: 1/2” TO 36”
(SEAMLESS UPTO 24”)
(WELDED 8” TO 36” )
Standards: ASME / ANSI - B 16.9
ASTM A403 - ASME SA403 - 'Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings'
API 590-605
ASME B16.9 - 'Factory-Made Wrought Buttwelding Fittings'
ASME B16.25 - 'Buttwelding Ends'
ASME B16.28 - 'Wrought Steel Buttwelding Short Radius Elbows and Returns'
MSS SP-43 - 'Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications'
Schedule: Sch 5 TO Sch XXS.
Thickness: Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc.
Type: Buttweld (BW)
Material and Grades:
Carbon Steel:
ASTM A234 Gr. WPB
ASTM A420 Gr. WPL6
ASTM A105
ASTM A350 Gr. LF2
Stainless Steel:
ASTM A403 WP316/316L
ASTM A403 WP304/304L
ASTM A182 F316L, 304L
COLLARS for ANSI 150 flanges |
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| inches | ND |
mm | Diameter of lap |
Height | Radius of fillet |
| D | G | h | R | ||
| 1/2 | 15 | 21,34 | 34,92 | 5 | 3 |
| 3/4 | 20 | 26,67 | 42,86 | 6 | 3 |
| 1 | 25 | 33,40 | 50,80 | 8 | 3 |
| 1 1/4 | 32 | 42,16 | 63,50 | 8 | 5 |
| 1 1/2 | 40 | 48,26 | 73,00 | 10 | 6 |
| 2 | 50 | 60,32 | 92,10 | 10 | 8 |
| 2 1/2 | 65 | 73,02 | 104,80 | 12 | 8 |
| 3 | 80 | 88,90 | 127,00 | 12 | 9 |
| 3 1/2 | 90 | 101,60 | 139,70 | 12 | 9 |
| 4 | 100 | 114,30 | 157,20 | 14 | 11 |
| 5 | 125 | 141,30 | 185,70 | 16 | 11 |
| 6 | 150 | 168,27 | 215,90 | 16 | 12 |
| 8 | 200 | 219,07 | 269,80 | 18 | 12 |
| 10 | 250 | 273,05 | 323,80 | 20 | 12 |
| 12 | 300 | 323,85 | 381,00 | 20 | 12 |
| 14 | 350 | 355,60 | 412,70 | 25 | 12 |
| 16 | 400 | 406,40 | 469,90 | 25 | 12 |
| 18 | 450 | 457,20 | 533,40 | 25 | 12 |
| 20 | 500 | 508,00 | 584,20 | 25 | 12 |
| 22 | 550 | 558,80 | 641,30 | 25 | 12 |
| 24 | 600 | 609,60 | 692,10 | 25 | 12 |
Dimension in mm. |
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| The values of radius "R" and height "h" are indicative | |||||
Packaging: ASME B16.9 Buttweld Collar Flanges is sleeved into plastic bag individually, ten pieces wrapped with water-proof material, bundled with nylon rope. Clear labels are tagged on the outside of the package for easy identification of the quantity and product I.D. Great care is taken during operation and transportation.
Prevent any damage.
During transportation items are tagged, packed in plastic bags and closed in carton boxes or seaworthy wooden cases.
plywood case,pallet and according to customer's requirment
Marking: ASME B16.9 Buttweld Collar Flanges are marked with alloy name, outside diameter, wall thickness and heat number. Additional information like standard and alloy numbers can be added on request.
Stainless Steel ASME B16.9 Buttweld Collar
Carbon steel ASME B16.9 Buttweld Collar
Duplex Steel ASME B16.9 Buttweld Collar
Nickel Alloy ASME B16.9 Buttweld Collar
Inconel ASME B16.9 Buttweld Collar
Incoloy ASME B16.9 Buttweld Collar
Hastelloy ASME B16.9 Buttweld Collar
Monel ASME B16.9 Buttweld Collar