European standard lap joint stub end

Name: European standard lap joint stub end
SKU: f9079a5c-eeaf-47fa-b218-f664883b9064

The European standard lap joint stub end is a dedicated matching pipe fitting for the European standard loose flange detachable pipeline system. It is specially designed for EU-standard industrial pipe networks and is widely used in oversea

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The core advantages of European standard lap joint stub ends are full European standard compliance, global applicability across the EU, no welding stress, no cutting required for disassembly and assembly, strong thermal buffering, and corro
Distinguish Type A reduced-pressure type and Type B full-pressure type working condition models
Dimensional tolerances, lap thickness, and mechanical properties fully meet standards
Enables 100% universal interchangeability with global European-standard piping
Zero obstacles in engineering acceptance in Europe and Russian-speaking regions. Integrated hot-pressed forming structure with no welds, no interlayers, and smooth and flat end faces

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Detailed Introduction

The European standard lap joint stub end is a matching pipe fitting in the European standard lap joint flange connection system, with the English name Lap Joint Stub End, implemented according to EN 10253 and DIN 2642 standards. Structurally, it is integrally formed by a straight pipe section and an outwardly flanged ring formed at the end, welded to the pipe end; the lap joint flange can rotate freely on the stub end body, and when the bolts are tightened, only the flanged end face is pressed to achieve sealing, so the pipe body does not bear the flange torsional stress, making later pipeline disassembly, inspection, and maintenance convenient. Product specifications cover DN15–DN2000, with corresponding outer diameters according to the EN/DIN European standard pipe outer diameter system; wall thicknesses include S series and SCH series, adapting to PN6 to PN160 European standard pressure ratings. Raw materials use European standard grade steel, including P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44 alloy steel, 1.4462 (2205), and 1.4507 (2507) duplex steel. Forming processes include seamless hot-pressed flanging, steel plate rolling and welding, and forged machining. The flanged rounded transition is smooth, the end face is flat, and dimensional tolerances follow European standard specifications, allowing interchangeability and matching with European standard lap joint flanges of the same specifications worldwide.

Implemented according to EN 10253 and DIN 2642 standards, with dimensional tolerances, flange thickness, and mechanical properties controlled according to European standard specifications, allowing interchangeability and matching with European standard lap joint flanges of the same specifications worldwide.
Two working-condition structures are provided: Type A reduced-pressure type and Type B full-pressure type; during procurement, the corresponding model can be selected according to the pipeline pressure design.
The lap joint flange can rotate 360° freely on the stub end body for alignment, and when the bolts are tightened, only the flanged end face is pressed, so the pipe body does not bear the flange torsional stress.
The integrally hot-pressed structure has a flat end face and fits tightly with the European standard lap joint flange, used in high-pressure sealing scenarios.
Materials cover P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44 alloy steel, 1.4462 (2205), and 1.4507 (2507) duplex steel, selectable according to working conditions.
Specifications cover DN15–DN2000, wall thicknesses include S series, SCH10S, SCH40S, SCH80S, SCH160, and XXS, and pressure ratings adapt to PN6 to PN160.
Supports customization such as non-standard straight pipe length, thickened flanged sealing face, special fillet radius, and non-standard bevel angle, as well as English laser marking and dedicated packaging for foreign trade.

Product Name	EN Standard Stub End
Product Categories	Flanges & Stub Ends
The parameters of this series of European standard lap joint stub ends fully comply with the authoritative EU standards EN10253, DIN2642, and EN1092-1, and are suitable for global European standard pipeline engineering design and acceptance specifications. Specification range	European standard nominal diameter DN15–DN2000, divided into long type, short type, and Type A and Type B working condition structural models, using pipe outer diameter dimensions exclusive to the European system. Wall thickness grades include the full S series, SCH10S, SCH40S, SCH80S, SCH160, and XXS extra-heavy series; pressure grades are compatible with all European standard grades PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. Mainstream European standard materials: P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44 alloy steel, 1.4462/1.4507 duplex steel. Forming process: seamless hot-pressed integrated forming, steel plate rolled
Customization	Our factory possesses full-dimensional foreign trade upgrading and non-standard customization capabilities for European standard lap joint stub ends, and can undertake various global European standard modification, special working condition, irregular size, and high-end process customization orders, adapting to the special engineering needs of Europe and Russian-speaking regions. It supports modification of conventional European standard sizes, and can customize non-standard straight pipe lengths, thickened lap joint sealing surfaces, special fillet radii, and non-standard bevel angles, adapting to overseas narrow installation spaces and special high-pressure sealing working conditions. High-end processes can be upgraded on demand, including 13CrMo44 alloy steel high-temperature heat treatment, duplex steel solution anti-corrosion treatment, stainless steel sanitary-grade mirror polishing, and carbon steel hot-dip galvanizing weather-resistant upgrading, matching overseas high-temperature, highly corrosive, and clean and harsh working conditions. It supports extra-large diameter irregular lap joints, eccentric structures, extended buffer-type stub ends, and non-standard pressure
MOQ	Our factory's European standard lap joint stub ends adopt a foreign trade flexible ultra-low minimum order mode, adapting to the diverse needs of European, Russian-speaking, and Middle Eastern overseas EPC project supplementary parts, foreign trade sample orders, full-container bulk distribution, and sporadic procurement for foreign-related projects. Overseas general conventional specifications include DN15–DN600 mainstream nominal diameters, standard S-type/L-type, conventional wall thicknesses, P265GH carbon steel/1.4
Lead Time	The factory has established a dedicated foreign trade production line for European standard pipe fittings and temperature-controlled export warehousing, regularly stocking a massive inventory of European standard lap joint stub ends that are hot-selling in Europe and Russian-speaking regions, and rapidly responding to the urgent delivery needs of global European standard foreign-related engineering projects. Overseas hot-selling DN15–DN600, conventional wall thickness, P265GH carbon steel, and 1.4301 stainless steel long and short type European standard lap joint stub ends are all in stock, orders
Packaging	European standard lap joint stub ends adopt EU export sea freight-grade high-end protective packaging, specially designed for cross-border long-distance sea and land transportation to Europe, Russian-speaking regions, and the Middle East, eliminating problems such as transportation deformation, end face scratches, moisture-induced rust, and salt spray corrosion. Small DN15–DN100 small-diameter stub ends are individually pasted with dust-proof protective film and fully wrapped with thickened bubble wrap, and pipe openings are fitted with high-strength hard plastic protective caps, focusing on protecting welding bevels and lap joint sealing end faces, isolating moisture and dust to prevent oxidation damage. Medium-sized DN125–DN600 specification products are wholly covered with double-layer waterproof and rust-proof woven fabric, with reinforced corner protection, avoiding end face wear and surface paint loss caused by cross-border bumps. Large DN800 and above large-diameter lap joint stub ends use fumigated solid wood pallets for fixation, multi-point flexible
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Applications

Process pipe networks and equipment supporting pipelines of European chemical and machinery manufacturing plants, implementing the EN/DIN European standard system.
European thermal power, cogeneration, boiler high-temperature auxiliary pipelines, and cross-border heat transmission pipe networks, in working conditions with alternating temperature differences and thermal displacement.
European coastal projects, ship piping networks, seawater desalination and desulfurization engineering need to cope with salt spray and chloride ion corrosive environments.
Urban water supply and drainage, gas and HVAC, and old European standard pipeline network renovation projects in Europe and Russian-speaking regions.
Pipeline systems implementing the European standard system in Middle East foreign-related EPC projects, as well as pipeline sections requiring frequent disassembly and maintenance.
Temporary maintenance and disassembly of European standard pipelines, multi-section pipeline network splicing, and outdoor open-air weather-resistant pipelines.

Purchasing & Delivery

European standard lap joint stub ends are implemented according to foreign trade export packaging standards: DN15–DN100 small-diameter products are individually affixed with dust-proof protective film, fully wrapped with thickened bubble wrap, and pipe ends are fitted with hard plastic protective caps to protect welding bevels and lap joint sealing end faces; DN125–DN600 medium-sized specifications are wholly covered with double-layer waterproof and rust-proof woven fabric, with reinforced corners; DN800 and above large-diameter products use fumigated solid wood pallets for fixation, multi-point flexible steel strip reinforcement, and double-layer waterproof sealed wrapping, and the pallets comply with EU customs quarantine standards. All products are classified and stacked according to European standard models, materials, and pressure ratings, with English traceability labels, specification parameters, and batch information affixed, and each batch is accompanied by Chinese-English European standard certificates of conformity, MTC material reports, and flaw detection inspection documents. The minimum order quantity and delivery time can be confirmed according to project specifications and quantities. You are welcome to contact us and provide dimensions, materials, pressure ratings, and quantities so that we can assist with a quotation.

Service & Support

We provide full-process support before, during, and after sales for overseas European standard pipeline projects. Before sales, we can assist with European standard specification selection, long and short type model matching, PN pressure rating adaptation, and material working condition confirmation, helping to avoid the risks of model mismatch and working condition incompatibility. During sales, we synchronize foreign trade production, European standard compliance re-inspection, export protective packaging, and cross-border logistics customs declaration progress, and provide qualification documents required for English engineering acceptance and customs clearance. After sales, we provide an 18-month international warranty period. During the warranty period, quality issues such as dimensional deviation, end face deformation, process defects, and sealing leakage caused by non-human installation errors can be replaced and reshipped free of charge. We are equipped with a foreign trade technical team and can provide European standard pipeline installation guidance, loose flange pairing and debugging, overseas pipeline network working condition optimization, and remote troubleshooting services.

FAQ

What is the difference between European standard Type A and Type B lap joint stub ends?

In the EN 10253 standard, Type A is a reduced-pressure type fitting, suitable for conventional working conditions with a reduced pressure coefficient; Type B is a full-pressure type fitting, capable of withstanding full load pressure, and suitable for high-pressure core process pipelines. The specific selection needs to be determined according to the engineering pressure design. You are welcome to contact us for assistance in confirmation.

How to select between European standard long-type and short-type lap joint stub ends?

The long type is suitable for European high-temperature power and chemical pipeline networks with large thermal displacement and obvious alternating temperature differences, offering stronger buffering performance; the short type has compact dimensions and is suitable for occasions with limited installation space. It is recommended to confirm based on pipeline working conditions and installation space. You are welcome to contact us for assistance in selection.

What flanges can European standard lap joint stub ends be used with?

The product is specifically designed for use with European standard loose flanges (backing flanges). The loose flange can rotate freely on the stub end body, and when the bolts are tightened, it only presses the flanged end face to achieve sealing. Dimensional tolerances follow European standard specifications and can be interchanged with European standard loose flanges of the same specifications worldwide.

Does the product support non-standard customization?

We can undertake customization orders for European standard modifications, special working conditions, and irregular dimensions, including non-standard straight pipe lengths, thickened flanged sealing surfaces, special fillet radii, non-standard bevel angles, as well as process upgrades such as 13CrMo44 alloy steel high-temperature heat treatment, duplex steel solution anti-corrosion treatment, stainless steel sanitary-grade mirror polishing, and carbon steel hot-dip galvanizing. We support English laser marking and customized export packaging. You are welcome to contact us with specific requirements for confirmation.

How are the minimum order quantity and delivery time confirmed?

We adopt a flexible minimum order model for foreign trade, which can accommodate different needs such as overseas EPC project spare parts, foreign trade sample orders, and full-container bulk distribution. Regular specifications are in stock. For the specific minimum order quantity and delivery time, please contact us to confirm based on specification, material, and quantity.

What quality documents are included with the product?

Each batch is accompanied by a Chinese-English EN standard certificate of conformity, MTC material report, and flaw detection inspection documents. If you need other acceptance or customs clearance documents, please contact us to confirm.

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