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 weld 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.
EN 10253-1 is the standard specification for butt welding pipe fittings of wrought carbon steel for general use and without specific requirements. Generally the material may be S235 or its alternative S265.
Click to download EN 10253-1 in PDF format.
EN 10253-2 is the standard specification for butt welding pipe fittings of non-alloy and ferritic alloy steels with specific inspection requirements. Typical materials include P235GH, P265GH, 16Mo3, 13CrMo4-5, P355NH, and L450QB, etc.
Click to download EN 10253-2 in PDF format.
EN 10253-3 is the standard specification for butt welding pipe fittings of wrought austenitic and austenitic-ferritic(duplex) stainless steels without specific inspection requirements.
Click to download EN 10253-3 in PDF format.
EN 10253-4 is the standard specification for butt welding pipe fittings of wrought austenitic and austenitic-ferritic(duplex) stainless steels with specific inspection requirements.
Click to download EN 10253-4 in PDF format: Part 1, Part 2.
*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.
| 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
| 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 | |||||||||||||||
