DIN standard lap joint stub end

The German standard lap joint stub end is the exclusive core pipe fitting for the German standard loose flange detachable pipeline system. It is specially designed for pipeline networks under German industrial standards and is widely used i

DIN standard lap joint stub end - DIN standard flanged short piece exclusively adapted to all domestic and overseas i...

DIN standard lap joint stub end

The German standard lap joint stub end is the exclusive core pipe fitting for the German standard loose flange detachable pipeline system. It is specially designed for pipeline networks under German industrial standards and is widely used i

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  • The core advantages of German standard lapped stub ends are original German standard compliance, German-style precision tolerances, no welding stress, non-destructive disassembly and assembly, excellent thermal buffering, and weather resist
  • Distinguish between Type A pressure-reducing type and Type B full-pressure type working condition models
  • Dimensional tolerances, lap thickness, fillet radius, and mechanical properties fully meet standards
  • Can achieve seamless interchangeability with German standard pipelines and flanges worldwide
  • Zero obstacles in engineering acceptance in Germany and Russian-speaking regions. Integrated hot-pressed forming structure with no welds, no interlayers, and flat and dense end faces
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Detailed Introduction

The German standard lap joint stub end is integrally formed by a straight pipe section and a lap ring flared outward at the end. During installation, the pipe body is butt-welded to the pipeline, and the loose flange can rotate freely on the stub end pipe body; when the bolts are tightened, only the flanged end face is pressed to achieve sealing, so the pipeline body does not bear the torsional stress of the flange, which facilitates later pipeline disassembly and maintenance. The product nominal diameter covers DN15–DN2000 and adopts the German standard pipe outer diameter system; wall thicknesses include the S series and SCH series, adapting to German standard pressure ratings PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. Raw materials use German 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 flaring, steel plate rolling and welding, and forged machining. The flared fillet transition is smooth, the end face is flat, and dimensional tolerances follow DIN specifications, allowing interchangeability and matching with German standard loose flanges of the same specifications worldwide.

  • Manufactured in accordance with DIN 2642 and EN 10253 standards, with dimensional tolerances, flanged thickness, and fillet radius executed according to German standard specifications, allowing interchangeability and matching with German standard loose flanges of the same specifications worldwide.
  • Two working-condition models are provided, Type A reduced-pressure type and Type B full-pressure type, as well as long-type and short-type structures, facilitating selection according to pipeline pressure design and installation space.
  • The loose flange can rotate 360° freely for alignment; when the bolts are tightened, only the flanged end face is pressed, and the pipeline body does not bear the torsional stress of the flange, reducing the risk of weld fatigue cracking.
  • The nominal diameter covers DN15–DN2000, the pressure ratings cover PN6 to PN160, and the wall thicknesses include the full S series, STD, SCH series, and XXS extra-heavy wall thickness.
  • Materials cover P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44/10CrMo910 alloy steel, and 1.4462/1.4507 duplex steel, which can be matched according to working conditions.
  • Supports customization such as non-standard straight pipe length, thickened flanged sealing face, special fillet radius, and non-standard bevel angle, as well as process upgrades such as 13CrMo44 high-temperature heat treatment, duplex steel solution treatment and anti-corrosion, stainless steel mirror polishing, and carbon steel hot-dip galvanizing.
Product NameDIN Stub End
Product CategoriesFlanges & Stub Ends
The parameters of this series of German standard lap joint stub ends fully comply with the authoritative German standards DIN2642, EN10253, and EN1092-1, adapting to global German standard pipeline engineering design and acceptance specifications. Specification rangeGerman standard nominal diameter DN15–DN2000, divided into long type, short type and Type A, Type B working condition structural models, adopting the German exclusive pipe outer diameter system. Pressure ratings cover the full range of German standard core PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160; wall thicknesses include S series, STD standard wall thickness, SCH full-series high-pressure wall thickness, XXS extra-heavy wall thickness. Mainstream German standard exclusive materials: P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44/10CrMo910 alloy steel, 1.4462/1.4507 duplex steel. Forming process: seamless hot-pressed integrated forming, steel plate rolling
CustomizationOur factory possesses full-dimensional German-style precision upgrading and non-standard customization capabilities for German standard lap joint stub ends, and can undertake various global German standard modifications, precision non-standard dimensions, special working conditions, and high-end process customization orders, adapting to special engineering needs in Germany and Russian-speaking regions. Supports precision modification of German standard conventional dimensions, can customize non-standard straight pipe lengths, thickened precision flanged sealing surfaces, dedicated fillet radii, non-standard bevel angles, adapting to German standard narrow installation spaces and high-end high-pressure sealing working conditions. Can upgrade German-style high-end processes on demand, including 13CrMo44 alloy steel high-temperature heat treatment, duplex steel solution anti-corrosion treatment, stainless steel mirror precision polishing, carbon steel hot-dip galvanizing weather resistance upgrade, matching German standard high-temperature, strong corrosion, clean and strict working conditions. Supports extra-large diameter special-shaped flanges, eccentric precision structures, add
MOQOur factory's German standard lap joint stub ends adopt a German-style foreign trade flexible ultra-low minimum order quantity model, adapting to diverse needs such as German domestic replenishment, Russian-speaking region EPC project spare parts, Central Asia and Middle East foreign trade sample orders, full-container bulk distribution, German standard engineering sporadic procurement, etc. Domestic and overseas German standard general conventional specifications, including DN15–DN600 mainstream nominal diameters, standard long and short types, conventional wall thicknesses, P265GH
Lead TimeThe factory has established a dedicated foreign trade production line and constant-temperature export warehouse for German standard pipe fittings, always stocking massive quantities of German standard lap joint stub ends in hot demand in Germany and Russian-speaking regions, rapidly responding to urgent delivery needs of global German standard foreign-related engineering projects. Market hot-selling DN15–DN600, conventional wall thickness, P265GH carbon steel, 1.4301 stainless steel long and short type German standard lap joint stub ends are all in stock, orders
PackagingGerman standard lap joint stub ends adopt German-style export sea freight-grade high-end protective packaging, specially customized for cross-border long-distance sea and land transportation to Germany, Russian-speaking regions, Central Asia and the Middle East, eliminating problems such as transportation deformation, end face scratches, precision dimensional deviation, moisture rust, salt spray corrosion, etc. Small DN15–DN100 small-diameter stub ends are individually pasted with dust-proof protective film, fully wrapped with thickened double-layer bubble film, pipe openings equipped with high-strength hard sealing protective caps, focusing on protecting welding bevels and flanged sealing end faces, eliminating precision loss and oxidation caused by dust and moisture. Medium DN125–DN600 specification products are overall wrapped with waterproof and rust-proof thickened woven fabric, comprehensively reinforced corner protection, avoiding surface wear and minor deformation caused by cross-border bumps. Large DN800 and above large-diameter lap joint stub ends
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Applications

  • Chemical, oil and gas, power, seawater desalination EPC engineering project pipeline systems in Germany proper and Russian-speaking regions, Central Asia, Middle East and other regions adopting DIN/EN German standard systems.
  • Precision industrial process pipe networks and equipment supporting fluid pipelines of German local chemical plants and machinery manufacturing plants.
  • German standard thermal power, cogeneration, boiler high-temperature auxiliary pipelines and cross-border heat transmission pipe networks, especially suitable for working conditions with alternating temperature differences and obvious thermal displacement.
  • German-speaking region coastal projects, ship supporting pipeline networks, seawater desalination and desulfurization engineering and other pipeline scenarios requiring chloride ion resistance and salt spray corrosion resistance.
  • German, Russian-speaking region urban water supply and drainage, gas and HVAC, and old German standard pipeline network renovation projects.
  • German standard pipelines requiring frequent disassembly and maintenance, precise splicing of multiple pipeline sections, or sealing and plugging of pipeline ends.

Procurement & Delivery

We adopt the German-style foreign trade flexible minimum order model; conventional specifications can be purchased in low quantities, and full-container bulk distribution is also supported. DN15–DN600, conventional wall thickness, P265GH carbon steel, 1.4301 stainless steel long and short type German standard lap joint stubs are kept in stock, and can respond to urgent delivery needs; for delivery cycles of other specifications and materials, please contact us for confirmation. Packaging is carried out according to German-style export sea freight-grade protection: small-diameter stubs are affixed with dust-proof protective film and fully wrapped with thickened double-layer bubble wrap, and pipe ends are fitted with hard sealed protective caps; medium-sized specifications are wholly covered with waterproof and rust-proof thickened woven fabric; for large diameters above DN800, fumigated solid wood pallets are used with flexible fixation, multi-point steel strap reinforcement, and double-layer waterproof sealed wrapping, and the pallets comply with EU and German customs quarantine standards. All products are stacked by German standard model, material, and PN pressure rating, affixed with German-English bilingual traceability labels, and accompanied by German-English bilingual certificates of conformity, MTC material reports, and flaw detection inspection documents with each batch.

Service & Support

Before sale, we provide German standard specification selection, long and short type model matching, PN pressure rating adaptation, and material working condition consultation, assisting in avoiding the risks of model mismatch and working condition incompatibility. During sale, we synchronize foreign trade production, German standard compliance re-inspection, export protective packaging, and cross-border logistics customs declaration progress, and provide German-English bilingual engineering acceptance and customs clearance qualification documents. After sale, we provide an 18-month international warranty period. During the warranty period, for quality problems such as dimensional deviation, end face deformation, process defects, and sealing leakage caused by non-human installation errors, we will unconditionally replace and reship for free and bear cross-border logistics losses. We are equipped with a 24-hour German standard pipe fittings technical team, providing pipeline installation guidance, loose flange pairing and commissioning, overseas pipeline network working condition optimization, and remote troubleshooting services.

FAQ

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

According to EN 10253 standard, Type A is a reduced-pressure type pipe fitting with a lower pressure coefficient, suitable for ordinary room-temperature conventional working conditions; Type B is a full-pressure type pipe fitting that can withstand full-load pressure, suitable for high-temperature and high-pressure core process pipelines. Specific selection needs to be determined according to German standard engineering pressure design parameters; you are welcome to contact us for assistance in confirmation.

How to select German standard long and short type lap joint stubs?

The long type is suitable for power and chemical pipeline networks in Germany with high temperatures, large thermal displacement, and obvious alternating temperature differences; the short type is suitable for working conditions with limited installation space or conventional conditions. Please provide the pipeline design temperature, pressure, and installation space, and we can assist in confirming the appropriate long or short type structure.

What flanges can the DIN standard lapped stub end be used with?

This product is used with DIN standard loose flanges (lap joint flanges). The loose flange can rotate freely on the stub end pipe body, and when the bolts are tightened, it only presses the flanged end face to achieve sealing. Product dimensional tolerances follow DIN specifications and can be interchanged and matched with DIN standard loose flanges of the same specifications worldwide.

What materials and pressure ratings of DIN standard lapped stub ends can you provide?

Materials cover P265GH carbon steel, 1.4301/1.4404 stainless steel, 13CrMo44/10CrMo910 alloy steel, 1.4462(2205)/1.4507(2507) duplex steel; pressure ratings cover PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160. Please contact us to confirm specific specification inventory and delivery lead times.

Do DIN standard lapped stub ends support non-standard customization?

Yes. We can customize non-standard straight pipe lengths, thickened precision flanged sealing surfaces, special fillet radii, non-standard bevel angles, extra-large diameter special-shaped flanges, eccentric precision structures, extended buffer-type stub ends, and non-standard PN pressure thickening. Process upgrades include 13CrMo44 alloy steel high-temperature heat treatment, duplex steel solution anti-corrosion treatment, stainless steel mirror precision polishing, and carbon steel hot-dip galvanizing weather resistance upgrade. You are welcome to provide drawings or dimensional requirements, and we will assist in confirming the solution.

What are the packaging and accompanying documents for DIN standard lapped stub ends?

Adopting German-style export sea freight-grade protective packaging, with protection graded by diameter, large specifications use fumigated solid wood pallets and comply with EU and German customs quarantine standards. Each batch is accompanied by German-English bilingual certificates of conformity, MTC material reports, and flaw detection inspection documents; products are classified and stacked by German standard model, material, and PN pressure rating, and affixed with German-English bilingual traceability labels.

What are the warranty period and after-sales response for German standard lap joint stub ends?

We provide an 18-month international warranty period. During the warranty period, for quality issues such as dimensional deviations, end face deformation, process defects, and sealing leakage caused by non-human installation errors, we provide unconditional free replacement and reissue and bear cross-border logistics losses. Equipped with a 24-hour German standard pipe fitting technical team, providing installation guidance, loose flange pairing and debugging, overseas pipeline network working condition optimization, and remote troubleshooting services.

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