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A Professional Supplier of

Stainless Steel Buttweld Fittings

We provides stainless steel butt-welding fittings of material 304, 304L, 316, 316L, 317L, 321, 310S, 347, 347H, 316Ti, 904L, 254 SMO, duplex 2205, Super duplex 2507 etc.

Stainless Steel Butt-weld Fittings

Stainless Steel Buttweld Fittings are defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system. Buttweld fittings is a butt-welded connected stainless steel pipe fittings, it is easy for installation and maintenance. In fact, we are not only do stainelss steel fittings, as well as alloy steel and special alloys, such as ASTM A234 WP5, WP11, WP12, WP91 etc, and nickel alloy C276, alloy 625, monel 400 etc.

We mainly manufacture and supply stainless steel buttweld fittings according to ASME B16.9, EN10253-4/-3 , including stainless steel elbow, equal/reducing tee, conc/ecc reducer, stainless steel cap, stainless steel stub end etc. We also manufacture and supply stainless steel butt weld fittings to ISO 05251, GOST 17380/17378/17375/17376/17379, JIS etc.

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Standard of Buttwelding Fittings

 

What Materials We Do*:

  • Stainless Steel

    ASTM A403 304/L, 304H 310S, 310H 316/L, 316Ti, 316H 317/L 321/H 347/H S31803 S32750 904L 254SMO (S31254)
  • Duplex & Super Duplex

     ASTM A815 UNS S31803, S32205, UNS S32750, S32760
  • Nickel-base Alloy

    Alloy 200, Monel 400, K500, Inconel 600, 625, Incoloy 800, 800H, 800HT, 825, alloy 20, alloy28, hastelloy C22, C276 etc.
  • Copper-Nickle Alloy

    Cu70Ni30(C71500, B30), Cu90Ni10(C70600,B10)
  • Titanium Alloy

    Gr. 1, Gr.2, Gr.11 etc.
  • Carbon Steel

    ASTM A234 WPB, WPC
  • Low Temperature Steel

    ASTM A420 WPL3, WPL6
  • Alloy Steel

    ASTM A234 WP5, WP9, WP11, WP12, WP22, WP91,WP911,WPR
  • High Yield Steel

    ASTM A860 WPHY42, 46, 50, 52, 56, 60, 65, 70

*The listed materials are for reference only, some materials will upon the quantity because we may have no raw material in stock. We are strength to supply stainless steel 304 weld fittings, 316 fittings, duplex S31803 fittings etc.

**DIN/EN equivalent grade is available, but sometimes we will use ASTM/ASME material to replace if the quantity is not considerable or the material is difficult to get. We will mark it in the offer.

 

Capacity:

  • Size: 1/2” to 104” for welded and seamless
  • SCH5S, SCH10S, SCH40S, STD, SCH80S/XS, SCH100, SCH120, SCH160, SCHXXS
  • Connection End: Butt-welded.
Product Size* Wall Thickness** Seamless Welded
Elbow 1/2″-24″ SCH10S~XXS
8″-104″ SCH5S~80S/XS  
Tee 1/2″-24″ SCH10S~XXS
8″-104″ SCH5S~80S/XS  
Reducer 1/2″-24″ SCH10S~XXS
8″-104″ SCH5S~80S/XS  
Cap 1/2″-80″ SCH10S~SCH160  
Lap Joint Stub End 1/2″-24″ SCH5S~80S/XS
8″-80″ SCH5S~80S/XS  

Note:

* Dimension range is not available for some special grade such C276 – 16″ x SCH160. Please make a specific inquiry for these materials.

**Wall thickness range is not available for duplex stainless steel and some special grade, please make a specific enquiry

 


Angularity Tolerance of  Buttweld Fittings ASME B16.9

Nominal Size DN 15-100 125-200 250-300 350-400 450-600 650-750 800-1050 1100-1200 1300-1500
NPS 1/2 – 4 5-8 10-12 14-16 18-24 26-30 32-42 44-48 52-60
Angularity
Tolerance
Off Angle Q 1 2 3 3 4 5 5 5 6.4
Off Plain P 2 4 5 6 10 10 13 19 20

*For more information of buttweld fittings, please feel free to contact us.


   

Inspection

Quality

Our factory are ISO 9001 and PED 2014/68/EU approved manufacturer. We believe that the quality is the life of company. To provide quality product is the things we are doing.

Why KAYSUNS

MATERIAL guaranteed

Raw material of stainless steel buttweld fittings are from reputed mill to guarantee the chemical composition and mechanical properties. Material certificate to EN 10204 3.1 / 3.2 will come with the orders.

Package Solutions

We have more than 15 years global experiences to supply stainless steel pipe fittings, not only butt-weld fittings, but also forged fittings, stainless steel flanges, threaded fittings and special fabricated on requirements.

FAST DELIVERY

Small quantity is available from ex-stock for common grade and dimension, fast delivery is possible to meet your needs well timely. We are also can support the transporation and efficient logistics service.

FACOTRY PRICE

Low cost from bulk production will reduce the product budget and improve your business. Buy from stainless steel buttweld fittings manufacturer directly will reduce the cost.

CUSTOMIZED FABRICATED

Customized fabrication to client’s design and sample are available.

THIRD PARTY INSPECTION

Third party inspection from SGS, ABS, BV, Lloyd’s, TUV, DNV, Intertek etc. are available for our product.

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