Long Welding Neck Flange
● Wall penetration connection nozzles for openings on pressure vessel shells and boiler headers
● Wall penetration pipelines for LNG cryogenic storage tanks and refrigeration equipment
● Wall-through piping for high-temperature heating furnaces and heat treatment equipment
Product Model
Description
- 产品描述
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Product Overview
Equipped with an extended tapered long neck, the extended section can directly pass through walls, be buried underground, or penetrate thermal insulation layers of equipment for application.
Core Technical Parameter Table
Parameter Item Parameter Value Abbreviation LWN Full Product Name Long Welding Neck Flange GB Standard Materials Carbon Steel:20#
Alloy Steel:16Mn、20MnMo、15CrMo、12Cr1MoV、14Cr1Mo、12Cr2Mo1、12Cr2Mo1V、12Cr5Mo、10Cr9Mo1VNbN、30CrMo、35CrMo
Low Temperature Steel:16MnD、20MnMoD、09MnNiD
Austenitic Stainless Steel:S30408 (304)、S30403 (304L)、S30409 (304H)、S32168 (321)、S32169 (321H) 、S34778 (347)、S34779 (347H) 、S31608 (316) 、S31603 (316L) 、S31609 (316H)
Duplex Stainless Steel:S22053 (2205)ASTM & ASME Materials Carbon Steel:A105
Low Temperature Carbon Steel (A350):LF2、LF3、LF6
Line Pipe Steel (A694):F52、F60、F65、 F70
Low Alloy Steel (A182):F5、F5a、F9、F91、F92、F11 (Cl.1/2/3)、F22 (Cl.1/3)
Austenitic Stainless Steel (A182):F304、F304L、F304H、F316、F316L、F316H、F321、F321H、F347、F347H
Duplex Stainless Steel (A182):F51 (2205)、F60 (S32205)Sealing Face Type RF、FF、RTJ PN Pressure Rating (GB Standard) PN10、PN16、PN25、PN40、PN63、PN100、PN160、PN250 Class Pressure Rating (ASME Standard) Class 150、300、600、900、1500、2500 Certifications API/ISO/CE Payment Terms L/C, D/P, T/T Delivery Lead Time 10-30 day Production Capacity 5000TONS/MONTH Applicable Standard The company manufactures flange products complying with international and domestic standards including ANSI B16.5, ASME B16.47/16.48, DIN EN 1092-1/2, JIS B2220, GOST 12821-80, GB/T 9124.1, SH/T 3406, SH/T 3426, SH/T 3425, HG/T 20615 and HG/T 20592. Production Process
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Qualification
Long Welding Neck Flange
● Wall penetration connection nozzles for openings on pressure vessel shells and boiler headers
● Wall penetration pipelines for LNG cryogenic storage tanks and refrigeration equipment
● Wall-through piping for high-temperature heating furnaces and heat treatment equipment
OUR SERVICE
We offers a wealth of product support resources, including a range of technical and downloadable product manuals to product certifications.
Our Service Product CatalogCOMPANY STRENGTHS
Experience
26 years of professional pipe fittings production and customization experience, with 45 senior technical engineers to support project development.
OEM/ODM
Full support OEM & ODM customization. We produce carbon/alloy/stainless steel fittings with 1000+ specs complying with GB, ASME, DIN, JIS standards.
Reliable Quality
Strict raw material selection & full-process inspection. Our lab equips complete devices for chemical analysis, mechanical test and NDT.
Certification
Possess full authoritative qualifications: ISO triple system, API Spec Q1, national pressure pipeline manufacturing license, EN10204 test certificates available.
Export
Located in Mengcun pipe fittings hub adjacent to Huanghua Port. Products cover all China provinces and export to Southeast Asia, Middle East, South America and more.
Advanced Equipment & Tech
200+ sets of advanced forging, CNC machining and full inspection equipment, annual output reaches 20,000 tons of high-pressure pipe fittings.