Flowone is a premier worldwide supplier for all your Nickel Alloy Buttweld Fittings needs.

Our ability to provide Nickel Alloy Buttweld Fittings on a project basis is one of our strongest capabilities and is unmatched in our industry.

Turnarounds or outages, planned retrofits or emergency situations, grassroots projects worldwide; Flowone has the experienced staff to assist you on all of your specialty alloy requirements, no matter how detailed the specification, no matter how difficult the situation.

New industry requirements, not an issue. We work closely with agencies like EPRI along with our utility and refining clients to be on the cutting edge of new industry requirements that affect your high energy/high temperature piping systems.

Our inventory is evolving to meet the new specifications that prevent current issues as creep cracking and hardness problems.

Buttweld(BW) Seamless and Welded :
90° LR Elbows / 90° SR Elbows / 90° Reducing Elbows / 45° Elbows / Tees / Reducing Tees / Concentric Reducers /
Eccentric Reducers / Caps / Stud Ends / Crosses / Reducing Crosses / 180° LR Return Bends / 180° SR Return Bends /
Laterals / Weldolets / Stud Ends / Swage Nipples / Nipples / Couplings / Weld Rings & Saddles
Pressure Fittings :
90° Elbows / 45° Elbows / Street Elbows / Tees / Corsses / Couplings / Reducers / inserts / Caps / Unions
Laterals, Bushings and Plugs & Pressure Fittings  
Pressures : 2000LB / 3000LB / 6000LB / 9000LB

Nickel Alloy Buttweld Fittings
Trade Name UNS# Nickel Alloy Buttweld Fittings
Alloy® 20 N08020 B/SB336 Grade WP20CB
NIckel 200 N02200 B/SB366 Grade WPN
Nickel 201 N02201 B/SB366 Grade WPNL
Monel®400 N04400 B/SB366 Grade WPNC
Inconel®600 N06600 B/SB Grade WPNCI
Inconel®625 N06625 B/SB366 Grade WPNCMC
Incoloy®800 N08800 B/SB366 Grade WPNIC
Incoloy®800H N08810 B/SB366 Grade WPNIC10
Incoloy®800HT N08811 B/SB366 Grade WPNIC11
Incoloy®825 N08825 B/SB366 Grade WPNICMC


Work Scope

The table shown above addresses only the WP Grade wrought buttweld fittings produced in accordance with ASME B16.9. The permissible raw materials and manufacturing operations listed in B/SB366 allow producing forged threaded and socket weld fittings in accordance with ASME B16.11.

Specifications B/SB366 cover all the material grades listed above. Alloy 20 is the only grade listed above that is covered by A/SA182. B/SB462 also covers Alloy 20 B16.11 forged fittings.

Most nickel/nickel alloy specifications especially in pipe and tube refer only to the uns number for material identification. Classes and Grades are occasionally used to identify options for items such as NDT, heat treatment or different methods employed when welding with filler metal such as single welded or double welded. these options do not result in an additional uns number in the nickel materials.

Grades/Classes/Identification Symbols are shown in this table only when they are used for material identification. Buttweld Fittings under B/SB366 have the same suffix class marking requirements (S,W,WX,WU and CR) as A/SA403.

Specification B/SB564 permits manufacture of all the grades listed above except for Nickel 201 and Alloy 20.
Refer to Flowones’ forged fitting web page for more details.


Review of Procurement Requirements:

Specification B/SB366 offers suggested requirements for purchasing requirements including but not limited to the following:

1) Quantities to be furnished.
2) Description of fitting including any non-standard dimensional requirements.
3) Alloy / UNS Designation.
4) Selection of heat treatment desired when purchaser options are offered. Refer to heat treatment requirements for Inconel 625 for an example.
5) WP fitting Class (S, W, WX or WU).
6) Any Purchaser Inspection requirements at the manufacturing facility.
7) Any purchaser requirements for providing material for Product Check Analysis.
8) Test Report requirements.
9) Any supplementary requirements desired.

Nickel Alloy Forged Fittings
Trade Name UNS# Nickel Alloy Buttweld Fittings
Alloy® 20 N08020 B/SB462A/SA182F20
NIckel 200 N02200 B/SB564
Nickel 201 N02201 ———-
Monel®400 N04400 B/SB564
Inconel®600 N06600 B/SB564
Inconel®625 N06625 B/SB564
Incoloy®800 N08800 B/SB564
Incoloy®800H N08810 B/SB564
Incoloy®800HT N08811 B/SB564
Incoloy®825 N08825 B/SB564


Work Scope

The three specifications listed provide the requirements for manufacture of a variety of forged items, including forged fittings to industry standards such as ASME B16.11.

These alloys are primarily selected for use in high temperature and/or corrosive environments.

Incoloy alloys 800H and 800HT are utilized in high temperature services where resistance to creep and rupture is required.

Review of Procurement Requirements:

These three specifications each have their own requirement for ordering material.

A/SA182: Refers to the guidelines in Common Requirements Specification A/SA961, along with addressing any options offered in A/SA182 and any purchaser requirement for manufacturing drawings for approval.

Lists these minimum suggested requirements for placement of an order:
1) Quantity.
2) Alloy name or UNS number.
3) Drawing, if required.
4) Forging sectioning, if required.
5) ASTM Specification and year of issue.
6) Any purchaser inspection requirements.
7) Any supplementary requirements.

Lists these minimum suggested requirements for placement of an order:
1) Alloy name (UNS number)
2) Heat treatment condition.
3) Quantity.
4) Certification/test report requirements.
5) Purchaser requirement for Check Analysis samples, if any.
6) Purchaser source inspection requirements, if any.

If you want to see more, Please contact to us.