Supply & Demand

Hollow Structure: Effectively reduces vibration transmission for enhanced comfort. Lightweight Design: Significantly reduces vehicle weight to improve energy efficiency. High Mechanical Performance: Ensures on-road stability and smoothness while enhancing handling.

Main Products: CDC Shock Absorber Cylinder Tube, Intermediate Cylinder, Outer Cylinder. High Precision: Enables accurate and consistent damping control. Low Friction: Ensures long-term reliability. Complex Forming Process: Achieves seamless assembly between components.

The socket weld flange has a similar appearance to the Slip-On Flange, but there is a socket step inside the flange. After the pipe is inserted, welding connects them together.  It is suitable for low-temperature and low-pressure applications, with pipe diameters less than 80.  The advantages of the socket weld flange are that the flange can be quickly removed, which is suitable for systems that require frequent maintenance and replacement. However, its sealing performance is poor, and it is suitable for use in drainage systems with water accumulation.  The pressure rating is Class 150 to Class 1500, or PN10 to PN160. It is a common choice for small-diameter high-pressure pipes.

The Lap Joint flange is a movable flange plate. Its structure is divided into two parts. One end of the pipe section is connected to the pipeline, and the other end is made into a socket weld ring.  This structure can effectively save costs. However, it can withstand relatively low pressure. It is commonly used in situations where the medium temperature and pressure are not high, but the medium is highly corrosive.It is suitable for low-pressure environments and can be frequently disassembled.

Threaded flanges are mechanical components that achieve non-welded connections between pipe threads and threaded pipes through internal hole processing. They belong to a detachable connection method. They are convenient for installation and maintenance, especially suitable for alloy steel pipeline systems where welding is prohibited and for special material connections with poor welding performance, effectively avoiding the additional stress caused by welding deformation. They are mostly used in low-pressure or dangerous liquid scenarios where welding is not allowed. They are typically limited to Class 300 and below, or PN40 and below.

Slip On Flange (also called as SO Flange) is a widely used piping connection component characterized by a hollow, cylindrical design that slips over the outer surface of a pipeline. It forms a secure joint through fillet welding on both the inner and outer sides of the flange hub, balancing reliability, ease of installation, and cost-effectiveness. As one of the most popular flange types in industrial applications, it is designed for moderate pressure and temperature conditions, with dimensions and specifications compatible with global standards such as ASME, EN, GOST, and JIS. Our SO flanges are widely adopted in general industrial pipelines due to their simple structure, convenient alignment, and economical cost.

Weld Neck Flange (also called as WN Flange) is a high-integrity, heavy-duty piping connection component widely used in industrial systems.  Characterized by a long, tapered hub that transitions smoothly to the pipe, it forms a permanent and robust joint through butt welding with the pipeline. This design ensures exceptional structural strength and leak-tight performance, making it the preferred choice for critical applications involving high pressure, high temperature, and volatile or corrosive media. Compliant with global standards such as ASME, EN, GOST, and JIS, our WN flanges are manufactured with precision to meet the diverse requirements of international projects.

ASTM A105 Carbon Steel Blind Flange – ASME B16.5 – Class 150 to 2500 Our ASTM A105 carbon steel blind flanges are manufactured to ASME B16.5, serving as reliable pipe end closures for oil & gas, petrochemical, power plants, and pressure testing applications. Available from ½" to 48" (DN15–DN1200), with pressure ratings Class 150 through Class 2500 (PN20–PN420). Solid disc design ensures complete isolation, enabling safe maintenance and system expansion. We source premium ingots from Baosteel and TISCO with full mill certificates. PMI verification confirms chemical composition per ASTM A105/A105N. Using 2,500–6,300 ton forging presses and ring-rolling mills, we refine grain structure, eliminate porosity, and achieve tensile strength ≥485 MPa, yield ≥250 MPa, elongation ≥22%. For low-temperature service down to -46°C, A350 LF2 grade is available with Charpy impact testing. All flanges undergo full normalizing (870–930°C) in programmable furnaces with digital time-temperature curves per batch. This eliminates residual stress, ensures uniform hardness (HB 137–187), and improves machinability. Q&T treatment also offered for higher strength grades. CNC vertical lathes and boring mills deliver high accuracy: Sealing faces: RF, FF, MFM, TG, RTJ per ASME B16.5. Surface roughness Ra ≤3.2 μm for RF, and ≤1.6 μm for RTJ grooves. Bolt circle tolerance ±0.5 mm, hole diameter H14 grade for easy field alignment. Thickness calculated per ASME VIII with safety factor ≥3.0, plus +1.0 mm machining allowance. 100% Non-Destructive Examination UT (ultrasonic) on all flanges DN150 & above per ASME V. MT (magnetic particle) on sealing faces and bolt holes to detect surface cracks. PT for stainless grades. Hardness testing per piece; hydrostatic (1.5× rated) or pneumatic (1.1×) tests available upon request. Every inspection record is compiled into a traceable quality dossier. Each flange is laser-marked with standard, material, class, size, heat number, and batch code for full traceability from raw material to finished product. Customer-specific markings also available. Standard coating: anti-rust varnish + protective pads on sealing faces. Options: hot-dip galvanizing, zinc plating, or epoxy powder coating for corrosive environments. Export packaging: VCI paper + polyethylene bag + foam padding, stacked on ISPM-15 plywood pallets with steel strapping. Large sizes bolted to steel cradles. Container stuffing secured with dunnage bags for sea freight safety. Documentation Each shipment includes: commercial invoice, packing list, bill of lading, COO, EN 10204 Type 3.1/3.2 MTC, NDE reports, heat treatment charts, and compliance declaration. Third-party inspection (SGS, BV, TÜV) coordinated upon request.

Stainless Steel Bars Shanghai Walmay Meta offers a complete range of stainless steel bar products, including round bars, square bars, hexagonal bars, and flat bars, engineered for demanding industrial applications. Material Grades: Available in 304/304L, 316/316L, Duplex 2205/2507, 431, 17-4PH, and 410/420 martensitic grades. All materials comply with ASTM A276, A479, A484, JIS G4303, DIN 17440, and GB/T 1220 standards. Dimensions: Diameters from 6mm to 300mm for round bars; squares and hexagons in various sizes; flat bars with widths up to 200mm. Custom lengths and tolerances available. Surface Finishes: Black/Bright (hot-rolled, annealed, pickled) – for further machining Peeled – smooth surface with tight tolerances Turned & Polished – precision finish for direct use Ground – high precision for critical rotating parts Mirror Polished – decorative and sanitary applications Product Features: Excellent corrosion resistance in acidic, chemical, and marine environments High strength-to-weight ratio for structural reliability Good machinability and weldability Heat-treatable grades available for enhanced mechanical properties Applications: Widely used in shafts and axles for machinery, fasteners (bolts, screws, nuts), valve stems and pump components, structural frames and supports, automotive and aerospace parts, as well as food and pharmaceutical equipment. Processing Services: We provide precision saw cutting, centerless grinding, chamfering, drilling, and heat treatment to meet your specific dimensions and performance requirements. Quality Assurance: Each shipment includes mill test certificates. Dimensional checks, hardness testing, and ultrasonic testing are performed to guarantee quality. With strong inventory, competitive pricing, flexible MOQ, and fast delivery via Shanghai ports, Shanghai Womei Metal is your dependable partner for stainless steel bar products. Come see us at Tube & Wire Shanghai 2026!

Stainless Steel Pipes & Tubes Shanghai Walmay Metal supplies high-quality stainless steel pipes and tubes in both seamless and welded constructions, available in round, square, and rectangular shapes. Material Grades: 304/304L, 316/316L, Duplex 2205/2507, and 310S for high-temperature applications. All products comply with ASTM A312, A269, A554, JIS G3459, DIN 17458, and GB/T 14976 standards. Dimensions: Outer diameter ranges from 6mm to 630mm, with wall thickness from 0.5mm to 40mm. Custom lengths and tolerances are available upon request. Key Features: Seamless tubes offer high strength and pressure resistance for critical systems Welded tubes provide cost-effective solutions for general applications Excellent corrosion resistance in acidic, alkaline, and marine environments Good formability and weldability for fabrication Surface Treatments: Pickled, annealed, polished, or brushed finishes to meet specific project requirements. Applications: Widely used in fluid and gas piping systems, structural frames and supports, heat exchangers and condensers, boiler tubes, automotive and machinery parts, as well as oil and gas pipelines. Processing Services: We offer precision cutting, beveling, threading, bending, and polishing to save you time and fabrication costs. Quality Control: Each batch comes with mill test certifications. Dimensional inspections, hydrostatic tests, and eddy current tests are performed to ensure reliability. With competitive pricing, low MOQ, and efficient logistics from Shanghai ports, we are your reliable source for stainless steel tubular products. Visit us at Tube & Wire Shanghai 2026 to discuss your project needs!

Shanghai Walmay Metal offers a full range of stainless steel sheets, plates, and coils in grades 201, 304/304L, 316/316L, 430, and Duplex 2205/2507, meeting ASTM, AISI, JIS, DIN, and GB standards. Surface finishes include 2B, BA, No.4, No.1, and 8K mirror polish. Thickness from 0.3mm to 100mm, widths up to 2500mm, with custom lengths available. We provide precision processing: leveling, slitting, cut-to-size shearing, laser cutting, edge trimming, and surface polishing. Applications cover architectural cladding, chemical vessels, food processing equipment, pharmaceutical systems, heat exchangers, new energy vehicle parts, and marine engineering. Each shipment includes mill test certificates, with third-party inspections available upon request. Competitive pricing, flexible MOQ, and fast port-backed logistics. Visit Shanghai Womei Metal at Tube & Wire Shanghai 2026!

pipeline and pipe fittings