Copper-nickel alloy lap joint stub end

Non-standard flanged stub ends are mainly used for special pipeline connections that cannot be adapted by various standard pipe fittings, renovation of old pipe networks, connection to irregularly shaped equipment, and operation and mainten

Copper-nickel alloy lap joint stub end - Non-standard flanged short pieces are exclusively adapted to all special-sha...

Copper-nickel alloy lap joint stub end

Non-standard flanged stub ends are mainly used for special pipeline connections that cannot be adapted by various standard pipe fittings, renovation of old pipe networks, connection to irregularly shaped equipment, and operation and mainten

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  • The core advantages of non-standard flanged short pieces are full-size free customization, on-demand adaptation to all working conditions, solving all standard blind spots, universal special-shaped connection, zero installation stress, and
  • fully customized one-to-one according to customer drawings, measured data, equipment ports, and special working conditions
  • can achieve special-shaped processing of any length, any flanging outer diameter, any thickness, and any fillet groove
  • perfectly adapts to old pipe network deviations, special-shaped interfaces of imported equipment, and restricted installation in narrow spaces. Continuing the flexible connection advantages of loose flange
  • Flange-free rotating alignment
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Detailed Introduction

Copper-nickel alloy lap joint stub ends are made by an integrated hot-press forming process, with the pipe body butt-welded and the end flared outward for sealing, and the flange can rotate freely for alignment, so installation will not generate torsional stress on the pipeline, helping to reduce the risk of weld fatigue cracking. Copper-nickel alloy itself resists seawater erosion, pitting corrosion, and crevice corrosion, is not prone to marine organism attachment in seawater environments, and is not easy to scale during long-term operation. Product nominal diameters cover DN15 to DN1200, compatible with GB, ASTM, EN, DIN, and JIS multi-system pipeline outside diameters, with wall thicknesses adapted to STD, XS, and SCH series, available in long and short standard structures, and also customizable in special-shaped structures according to drawings. We supply for EPC projects and special industrial projects such as ocean-going vessels, offshore wind power, offshore oil and gas platforms, seawater desalination, coastal power plants, and chemical brine transportation, and support multilingual drawings and acceptance documentation packages.

  • The material is 90/10 (C70600) or 70/30 (C71500) copper-nickel alloy, which resists erosion, pitting corrosion, and crevice corrosion in seawater and high salt spray environments, and is suitable for replacing carbon steel or stainless steel pipe fittings in seawater systems.
  • The loose flange can rotate freely for alignment, and the pipe body does not bear torsional stress during installation, reducing the risk of weld fatigue cracking and butt joint misalignment.
  • Nominal diameters cover DN15 to DN1200, compatible with GB, ASTM, EN, DIN, and JIS pipeline outside diameters, with wall thicknesses adapted to STD, XS, and SCH series, facilitating selection for cross-border multi-standard projects.
  • Supports custom long and short structures and special-shaped structures according to drawings, and can adjust pressure-bearing, anti-corrosion, temperature resistance, or sealing solutions for specific working conditions.
  • MOQ as low as 1 piece, a single piece can be tooled for customization and produced and shipped, suitable for engineering rectification, special-shaped replacement parts, and single-set equipment matching.
  • Conventional simple non-standard structures are delivered within 3 to 5 working days after drawing confirmation, and can respond to urgent on-site repairs and expedited replacement part needs.
  • Provides an 18-month warranty. For installation deviations, sealing leaks, structural defects, or performance failure problems caused by custom processes, production dimensions, or material performance, we will unconditionally remake and reship free of charge.
Product NameCopper-Nickel Alloy Lap Joint Stub End
Product CategoriesFlanges & Lap Joint Stub Ends
CustomizationThis factory possesses super-strong customization capabilities for non-standard lap joint stubs across all dimensions, all structures, and all working conditions, and can undertake various customized orders worldwide for non-standard, irregular-shaped, special-sized, special-process, and special-working-condition requirements, achieving production upon drawings, implementation upon actual measurement, and adaptation upon working conditions. It supports customization of arbitrary non-standard pipe body lengths, non-standard lap diameters, non-standard seal thicknesses, non-standard rounded bevels, and eccentric reducing irregular structures, adapting to deviations in old pipe networks, irregular equipment interfaces, and installation in confined spaces. It can customize special processes as needed, including high-temperature pressure-bearing strengthening, strong-corrosion solution treatment, low-temperature embrittlement resistance, ultra-thick high-pressure, and widened sealing, adapting to extreme special working conditions. It supports ultra-large-diameter irregular rolling, high-precision forged machining, special alloy forming, and multi-standard transitional mixed non-standard structures.
MOQThe non-standard flanged stub end adopts a zero-threshold customized flexible minimum order model, specifically adapted to engineering rectification, irregular replacement parts, single-set equipment matching, small-batch technical transformation, and sample actual testing needs, with MOQ as low as 1 piece; a single piece can be mold-customized, and a single piece can be produced and shipped, with no minimum order quantity, no specification restrictions, and no material threshold. Regardless of ultra-small irregular diameters, ultra-large non-standard diameters, or special thickened structures
Lead TimeNon-standard flanged stub ends implement a tiered rapid customization delivery system, flexibly scheduling production based on irregular-shape difficulty, size specifications, material processes, and order volume, efficiently responding to emergency rectification needs of non-standard projects. For conventional simple non-standard structures, conventional materials, and products with ordinary dimensional deviation modifications, rapid delivery is made within 3–5 working days after drawing confirmation, suitable for urgent on-site repairs, temporary rectifications, and expedited replacement parts.
PackagingNon-standard flanged short pieces adopt customized graded export protective packaging, providing differentiated protection according to irregular structures, non-standard sizes, and oversized or undersized specifications, completely preventing deformation during transportation of irregular pipe fittings, end face collisions, sealing surface scratches, and damage to non-standard structures. Small irregular non-standard short pieces are individually film-wrapped, fully covered with double-layer bubble wrap, and custom irregular protective caps are added to pipe openings and irregular flanged end faces, exclusively protecting irregular sealing surfaces and bevels. Medium-sized non-standard irregular products are individually wrapped in waterproof and rust-proof cloth, with reinforced corner protectors, preventing irregular protrusions, irregular edges from vibration wear, paint loss, and oxidation. Extra-large diameter, extra-long irregular, and eccentric non-standard structures adopt custom solid wood pallets for fixation, multi-point flexible binding, and double-layer waterproof sealed wrapping, specifically securing irregular stress points, completely preventing deformation during long-distance transportation.
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StandardsASTM B151, ASTM B466, ASME B16.9

Applications

  • Seawater piping systems such as ballast water, firefighting water, and cooling water systems on ocean-going vessels and offshore platforms require pipe fittings that resist seawater erosion and marine biofouling.
  • High-pressure pump outlets in seawater desalination projects, membrane module inlet and outlet water pipelines, and condensate water systems of coastal power plants.
  • Pipelines for conveying chloride ion-containing media or brine in coastal chemical and salt chemical projects.
  • In the technical transformation of the pipeline network in old factory areas, deviations in the connection between new and old pipelines and irregular dimensions measured on site require custom lap joint stub ends for adaptation.
  • For non-standard nozzle connections of imported special-shaped pressure vessels, heat exchange equipment, or special-purpose units, when standard pipe fittings cannot match, customization is carried out according to the equipment port data.
  • In space-constrained locations such as dense pipe galleries, narrow and small well chambers, or equipment crevices, special structures with ultra-short pipe bodies or narrow-edge flanges are required.
  • Pipeline connections in cross-border EPC projects with mixed multiple standards, non-standard transitions, or special acceptance requirements.

Procurement & Delivery

Copper-nickel alloy lap joint stubs are quoted according to project requirements, and the price is affected by material grade, nominal diameter specification, structural form, customization process, and order quantity. MOQ is as low as 1 piece; a single piece can be molded, customized, and shipped, with no minimum order quantity, no specification restrictions, and no material threshold. For conventional simple non-standard structures, conventional materials, and products modified for ordinary dimensional deviations, delivery is within 3 to 5 working days after drawing confirmation; for complex special shapes, special materials, or large-volume orders, please contact us to confirm the production scheduling cycle. Packaging provides graded protection according to special-shaped structures and specifications: small parts are film-covered and wrapped with double-layer bubble wrap, and pipe openings and lap joint end faces are fitted with custom protective caps; medium-sized parts are wrapped in waterproof and rust-proof cloth with reinforced corners; extra-large diameter and extra-long special-shaped parts use custom solid wood pallets for fixation, multi-point flexible binding, and double-layer waterproof sealed wrapping. Labels are affixed piece by piece indicating drawing number, measured dimensions, working-condition material, and batch information, and each batch is accompanied by inspection reports, dimensional measurement records, and material certification documents.

Service & Support

Before sales, we provide free drawing review, dimension verification, process optimization, working-condition matching, and non-standard feasibility assessment to help avoid the risks of dimensional mismatch, process incompatibility, or on-site installation failure. Customization is also possible without drawings; provide on-site measured dimensions, equipment port data, installation space constraints, and working-condition parameters, and our technical team can provide free drawing and modeling, structural optimization, and production drawings. During sales, we synchronize production progress, measured data, inspection reports, and process details in real time, and provide a full set of acceptance and customs clearance documents free of charge. After sales, we uniformly provide an 18-month warranty. For installation deviations, sealing leakage, structural defects, or performance failures caused by customized processes, production dimensions, or material performance, we will unconditionally remake and reship free of charge and bear all losses. We are equipped with a 24-hour non-standard pipe fitting technical team to provide on-site installation guidance, non-standard connection commissioning, working-condition optimization, and remote troubleshooting, following up throughout the project acceptance process.

FAQ

What is the difference between copper-nickel alloy lap joint stubs and standard lap joint stubs?

Standard lap joint stubs are produced according to fixed standard parameters, and their dimensions and structures are constrained by standards. Copper-nickel alloy lap joint stubs use 90/10 or 70/30 copper-nickel alloy in material, making them suitable for seawater and high salt spray environments; in structure, they can be customized according to customer drawings, measured data, or equipment port data, and are used for special-shaped interfaces, old deviations, or narrow spaces that standard pipe fittings cannot adapt to.

Can customization be done without drawings?

Yes. Provide on-site measured dimensions, equipment port data, installation space constraints, and operating condition parameters, and our technical team can provide free drawing and modeling, optimize the structure, and issue production drawings. Once confirmed, production can be arranged.

Can a single piece be produced?

We support a minimum order of 1 piece. Single-piece custom shapes, single-piece modifications, and single-piece replacement parts can all be produced, with no minimum order quantity, no specification restrictions, and no material threshold.

What is the regular delivery time?

For regular simple non-standard structures, regular materials, and products modified with ordinary dimensional deviations, delivery is 3 to 5 working days after drawing confirmation. For complex custom shapes, special materials, or large-volume orders, please contact us to confirm the production scheduling cycle.

What does the warranty cover?

We provide an 18-month warranty. For installation deviations, sealing leaks, structural defects, or performance failures caused by custom craftsmanship, production dimensions, or material performance, we will unconditionally remake and reship them free of charge and bear all losses.

How can I get a quote?

Please provide the material grade, nominal diameter specification, structural form, quantity, as well as drawings or measured data, and we will assist with a quotation according to the project requirements. The price is affected by material, specifications, customized craftsmanship, and order quantity. You are welcome to contact us to confirm the specific configuration and price.

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