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Lap Joint Stub End ASME B16.9

Size: 1/2″~24″
Material: Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel
Standards: ANSI, BS, DIN, EN, JIS, etc
Supply Ability: 10000 Pieces per Month
Certificate: CE / ISO / SGS
Port: Shanghai Port
Payment Term: L/C, T/T
Packing: Export standard Plywood Pallets/ free fumigation wooden case.

Please send emails to sales@steelfittings-flange.com for prices.


Buttweld Lap Joint Stub End Manufacturer & Exporter.

Estan pipe fittingsĀ is a premier lap joint stub end manufacturer and supplier in China. Based on different materials, our lap joint stubs can be sorted into carbon steel lap joint stubs, stainless steel lap joint stubs, alloy steel lap joint stubs, high-strength steel lap joint stubs, low-temperature steel lap joint stub, etc.

These products have passed ISO 9001, Pressure Equipment Directive 97/23/EC (PED 97/23/EC), AD2000 Merkblatt W0, and API certification, and are used by NIGC, Petrobras, Pemex, CNPC, Sinopec, and CNOOC. Our lap joint stubs have been exported to over 36 countries, including Italy, Germany, Spain, France, Russia, the United States, Brazil, Iran, India, to name just a few.

Buttweld Lap Joint Stub EndĀ Specification

Outside Diameter 1/2ā€ ~ 24ā€ (DN15 ~ DN600)
Wall Thickness 3mm ā€“ 40mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Types End Pipe, Pipe Lap Joint Stub End, Dish Lap Joint Stub End, Lateral Lap Joint Stub End
Value-Added Services Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering
Standards ASME B16.9-2012, ASME B16.25-2012, ASME B36.10M-2004, ASME B36.19M-2004
MSS SP-43-2013
AFNOR NF A 49-170-1-1999, AFNOR NF A 49-170-2-2009, AFNOR NF A 49-170-3-2009, AFNOR NF A 49-170-4-2009
ISO 3419-1981, ISO 5251-1981
GB/T 12459-2005


Buttweld Lap Joint Stub End Material Grades

Stainless Steelļ¼šASTM A403 WP Gr. 304, 304L, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L
Carbon Steelļ¼šASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Low Temperature Carbon Steelļ¼šASTM A420 WPL3, A420 WPL6
Alloy Steelļ¼šASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
Duplex Steelļ¼šASTM A 815, ASME SA 815 UNS NO S31803, S32205. S31254ļ¼ŒS32750ļ¼ŒS32760
Nickel Alloyļ¼šASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 )

Marking & Packing

Buttweld lap joint stubs ends are packaged to ensure that there is no damage during transit. In the case of exports, standard export packaging is done in wooden cases. All buttweld lap joint stubs ends are marked with Grade, Lot No, Size, Degree,Ā  and our trademark. On special requests,Ā  we can also, make custom marking on our products.

Quality Assurance

At Estan pipe fittings, all buttweld lap joint stubs ends are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions, and quality conformity of products.


  1. Oil and gas industry
  2. Petrochemical industry
  3. Power generation industry
  4. Pharmaceutical industry
  5. Shipbuilding industry
  6. Papermaking industry
  7. Metallurgy industry