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ASME / ASTM Butt weld fittings

We have a well-stocked supply of elbows, tees and reducers according to ASME B 16.9 as well as a large selection for a wide variety of customer requirements.

Our product range covers all common designs and dimensions in different materials. We also supply special butt weld fittings such as lap-joint stub ends in the highest quality.

Designs and standards

Standardised ASME / ASTM butt weld fittings come in a wide variety of designs. We would therefore recommend that you enquire about common variants that you may need to ensure availability.

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Designs according to ASME B 16.9 rff+ Datasheets
Elbows, seamless and welded    
Long Radius / LR
Short Radius / SR
Elbows type 3D on request
1/2" - 48"
1" - 24"
Tees and crosses, seamless and welded    
1/2" - 48"
1/2" - 48"
Reducers, seamless and welded    
1/2" - 48"
1/2" - 48"
  1/2" - 48" Download
Lap Joint Stub Ends    
  1/2" - 24" Download
Special fittings made from plates, steel round-bar
according to drawing

General information

Information on ASME rff+ Datasheets
Tolerances and weld seam preparation B 16.9 / 16.25 Download

Material grades

ASME covers a wide range of materials used for unalloyed, alloyed heat-resistant, low-temperature and stainless steel material grade butt weld fittings. We supply all common types available for delivery.

Material selection Material groups
A/SA 234, Grade WPB Unalloyed heat-resistant
A/SA 234 Grade WP5, 11, 12, 22, 91 Alloyed heat-resistant
A/SA 420 Grade WPL6 Low-temperature
A 860 Grade WPHY42, 52 High yield steel
L290NE, L360NE High yield steel
A/SA 403 Grade WP 304/l, 321/H, 316/L Stainless steel
UNS S31803 (Duplex), UNS S32750 (Superduplex) Duplex / Superduplex
Special Alloys Special steel


The standard allows a variety of options. Availability of individual dimensions and wall thicknesses is limited - please request in advance.

Wall thicknesses

The standards distinguish standard wall thicknesses according to ASME B 36.10 and B 36.19 for stainless steel. We supply all common wall thicknesses from S10 to XXS and S10S to S80S.

Processing and modification

We have a processing service certified by TÜV to saw, bevel, taper, blast, coat, and mark butt weld fittings according to ASME/ASTM for any requirement according to customer specification.

Products compatible with our ASME butt weld fittings

Product catalogues

Refer to our media centre for more details on pipes, flanges, butt weld fittings and pipe equipment according to DIN, EN and ASME.

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ASME / ASTM Pipe Equipment

ASME / ASTM Pipe Equipment

Best advice

A system is only complete with the required pipe equipment. We supply the corresponding pipeline materials to all major ASME/ASTM standards.

DIN EN / DIN Butt weld fittings

DIN EN / DIN Butt weld fittings

Delivery guaranteed

Our delivery programme covers all needs for elbows, tees, reducers and caps according to DIN EN 10253 Parts 1 to 4.