HSFitting.com

About HSFitting

Wenzhou Huashang Steel Co., Ltd, operating under the domain hsfitting.com, is a trusted manufacturer and exporter of high-quality industrial steel fittings and flanges. As part of Zhejiang Aoxing Pipe Fitting Co., Ltd., we are proudly based in Longwan, Wenzhou — internationally recognized as the capital city of stainless steel in China.

Our expertise lies in producing industrial carbon steel, stainless steel, and sanitary-grade butt welding, threaded fittings, and forged flanges. We strictly comply with international standards including ASME/ANSI, MSS, DIN, JIS, GB, SH, SY, HG, and DL, ensuring our products meet the highest global quality benchmarks.

Our products are exported to markets across Europe, South America, North America, Africa, the Middle East, and Taiwan, serving industries such as oil & gas, petrochemicals, power generation, and marine engineering.

Our Products

Engineered to meet global standards with precision and durability

Stainless Steel Fittings

Types: Elbow (45°, 90°), Tee, Reducer, Stub Ends, Cap
Standards: ASME B16.9, JIS B2311, DIN2605, EN10253
Materials: 304, 304L, 316, 316L, 321, 347, 904L, Duplex (S31803, S32750)
OD Range: DN15 (1/2") to DN800 (32")
Wall Thickness: SCH 5S to SCH 160

Carbon Steel Fittings

Types: Seamless & Welded Elbows, Tees, Reducers, Caps
Standards: ASTM A234-WPB/WPC, MSS SP-43/SP-75
Materials: ASTM A234-WPB, WPC, L245, L290, WPHY42–WPHY70
OD Range: DN15 to DN3000 (120")
Applications: Oil & Gas, Refineries, Power Plants

Alloy Steel Fittings

Materials: 12CrMo, 15Cr5Mo, Cr5Mo, 12Cr1MoV, WP11, WP22, WP91
Standards: ASTM A234, MSS SP-75
High-Temp Use: Ideal for thermal power and chemical plants
Form: Seamless and Welded
WT: SCH 5S to SCH 160

Steel Flanges

Types: Weld Neck, Slip-On, Blind, Lap Joint, Threaded
Standards: ASME B16.5, B16.47, DIN, JIS, GB, HG
Size: 1/2" to 120"
Pressure: ANSI 150–2500 LBS, PN6–PN400
Materials: F304, F316, F51, F53, A105, LF2

Stainless Steel Seamless Pipes

OD: φ6–φ830mm
WT: 0.5–45mm
Standards: ASTM A312, A213, ASME SA213, SA312, GB/T14976
Materials: TP304, TP316L, TP321, TP347H, 904L, S31803
Applications: Heat exchangers, boilers, high-pressure systems

Stainless Steel Welded Pipes

OD: φ6–φ3000mm
WT: 0.5–40mm
Standards: ASTM A789, A790, ASME SA789, SA790
Materials: 304, 316L, 317L, 254SMO, 904L
Form: Straight seam, spiral welded

Forged Fittings

Types: Threaded Fittings, Socket Weld Fittings
Standards: ASME B16.11, MSS SP-97
Size: 1/8" to 4"
Materials: A105, F304, F316, F321
Pressure Rating: 3000#, 6000#, 9000#

Alloy Steel Seamless Pipes

Materials: 12Cr1MoV, 15CrMo, Cr5Mo, A335 P11/P22/P91
Standards: ASTM A335, A213, GB5310
OD: φ6–φ830mm
WT: 1–45mm
Applications: High-temperature and high-pressure systems

Super Duplex & Nickel Alloys

Materials: S32750, S32760, 254SMO, N08825, N08904, N06600
Standards: ASTM A815, A182, B366, B625
Applications: Offshore, desalination, chemical processing
Corrosion Resistant: Ideal for aggressive environments
Forms: Fittings, Flanges, Pipes

Custom & Special Fittings

Custom Fabrication: Based on customer drawings
Special Types: Reducers, elbows, tees, caps
Materials: Any grade upon request
Standards: ASME, DIN, JIS, or customer-specific
Support: Engineering and technical consultation

Quality & Certifications

Certified Standards

Our products comply with international standards including ASME, ANSI, MSS, DIN, JIS, GB, SH, SY, HG, and API. We maintain strict adherence to ensure reliability and safety in every product.

Quality Control

From raw material inspection to final product testing, we implement rigorous quality control processes including chemical analysis, mechanical testing, hydrostatic testing, and NDT.

Advanced Facilities

Our modern workshop is equipped with CNC machines, forging presses, heat treatment furnaces, and automated welding systems to ensure precision and consistency.

Frequently Asked Questions

What materials do you offer for fittings and flanges?

We offer a wide range of materials including Stainless Steel (304, 316L, 321, 904L), Duplex/Super Duplex (S31803, S32750), Carbon Steel (A234-WPB), Alloy Steel (WP11, WP22), and Nickel Alloys (N08825, N06600).

Do you comply with international standards?

Yes, our products meet ASME, ANSI, DIN, JIS, GB, MSS, API, and other international standards. We can also manufacture to customer-specific requirements.

Can you produce custom fittings?

Absolutely. We accept custom drawings and specifications for special fittings, flanges, and pipes. Our engineering team supports full customization.

What is your production capacity?

We have a robust production line capable of manufacturing from small batches to large-scale industrial orders with efficient lead times and global shipping.

How do you ensure product quality?

We implement a comprehensive quality control system including raw material testing, in-process inspections, final product testing (hydrostatic, NDT, PMI), and full documentation.

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