Can you produce custom sizes or non-standard flanges?

Yes. Custom sizes, special materials, and drawings-based forgings are available.

How can I get a quote?

Please send us your specifications: size, material, standard, quantity, and any special requirements. We will reply within 24 hours.

Custom T&G F51 Bl DN4000 Large Diameter Vessel Flange

Name: Custom T&G F51 Bl DN4000 Large Diameter Vessel Flange
Brand: Shanghai Guanxin Forging Co., Ltd.
SKU: 2296072975

Shanghai, ChinaShanghai Guanxin Forging Co., Ltd.

US$1.00-5,000.00

1 Piece

Product profile

Customization

Available

Standard

ANSI, DIN, GB, JIS, GOST, En1092-1

Type

Customized

Model NO.

WN, LWN, SO, BL, SW, LJ, PL, Threaded Flange, etc.

Material

Carbon Steel, Stainless Steel, Alloy Steel, Nickel

Structure

Flanges

Connection

Flanged

Sealing Surface

Raised Face / Flat Face / Ring Joint, etc.

Manufacturing Way

Forging

Flange Type 1

Weld Neck / Long Weld Neck / Slip on / Blind

Flange Type 2

Threaded / Lap Joint / Socket Weld / Plate Flange

Flange Type 3

Spectacle Blind Flange/ Paddle Blank & Space

Flange Type 4

Orifice Flange

Size Range

1/2"-60" / DN 10-DN 4000

Pressure Rating

Class 150-Class 2500 / Pn 2.5-Pn 420

Transport Package

Plywood Case/Pallet or Other Requested Packaging

Specification

Standard and customized as per drawing available

Trademark

Customized

Origin

China

Key features

Extensive Material Options: Carbon steel, stainless steel, alloy steel, nickel, and duplex alloys available.

Wide Size Range: Available from 1/2' to 60' (DN10 to DN4000) for various applications.

Comprehensive Standards: Meets ANSI, DIN, GB, JIS, GOST, and EN1092-1 standards.

Multiple Flange Types: Weld neck, slip on, blind, threaded, lap joint, and orifice flanges.

High Pressure Ratings: Class 150 to Class 2500 (PN 2.5 to PN 420) pressure capabilities.

Custom Manufacturing: Non-standard flanges and forgings produced per customer drawings.

Full Quality Certifications: ISO 9001, ISO 14001, ISO 45001, and EN 10204 3.1 MTCs included.

Factory Direct Pricing: Direct from manufacturer with no middlemen to save budget.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceExperienced TeamExhibition Experience

Shanghai Guanxin Forging Co., Ltd.

Shanghai, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤24h

AI-Powered supplier vetting

SummaryShanghai Guanxin Forging Co., Ltd. is a limited company with seven employees, offering flanges and forgings. It is identified as a professional technical supplier and provides 3D software design and multiple customization options. The supplier reports ISO 9001 and ISO 14001 certification and has an SGS audit record dated May 18, 2026 to May 17, 2027, although the stated audit evaluation result is 0 and no interpretation is provided. Its production process covers material sourcing, forging, heat treatment, machining, inspection, marking, and packaging, with 6–10 quality-control staff reported in one slice. Export sales account for 90%, and the supplier has six years of export experience. However, it has no overseas showroom, agents, or branches; no SDK; and no written procedures or records for supplier approval, corrective actions, complaint handling, or service capability. Evidence of customer cases is not provided.

Supplier typeThe supplier is Shanghai Guanxin Forging Co., Ltd., a limited company that is not part of a larger company group. Its stated products are flanges and forgings, and its business activities are conducted under its business license.

CertificationsThe supplier reports ISO 9001 and ISO 14001 certification. An SGS audit is also recorded as valid from May 18, 2026 to May 17, 2027, but the audit evaluation result is listed as 0 without an explanation, so the audit outcome cannot be positively interpreted from the provided data.

After-Sales capabilityThe supplier has no overseas showroom, overseas agents, or branches, although it has participated in the Wire & Tube 2026 Düsseldorf trade show. More importantly, it reports no written procedures or records for complaint handling, corrective and preventive actions, supplier service procedures, or approved supplier lists, and it reports no quality assurance in quality-control processes.

R&D capabilityThe supplier is identified as a professional technical supplier and provides 3D software design services with customization from samples, designs, full customization, minor customization, and flexible customization. However, it has no available SDK, and the total experience of its R&D engineers is listed as not applicable.

Production capacityThe stated process covers material sourcing, forging, heat treatment, machining, quality inspection, mechanical marking, and packaging. The supplier reports 6–10 quality-control staff, offers peak-season lead times of one month and off-season lead times within 15 working days, and supplies flanges and forgings; however, finished products are checked by packing staff.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also provides 3D software design services, directly supporting customized product development.

Product Q&A

Q:What standards do you follow?

We produce according to ANSI/ASME B16.5, B16.47, DIN, EN1092-1, JIS, BS, GOST, and custom requirements.

Q:What materials are available?

Carbon steel (ASTM A105, A350 LF2, etc.), stainless steel (F304/F316, etc.), alloy steel (F11, F22, F91, 4140, 4340, etc.), duplex, and more upon request.

Q:Do you provide MTCs?

Yes. Each order comes with Mill Test Certificates (MTCs) showing chemical composition and mechanical properties.

Q:Can you accept third-party inspection?

Yes. SGS, BV, TUV, or any inspection agency you specify is welcome before shipment.

Q:What is your MOQ?

No strict MOQ. Samples, small orders, and bulk orders are all acceptable.