Hardware Accessories

Industrial Hardware Accessories Manufacturer & Wholesale Supplier

Shanxi Yuanhang Machinery Construction Industry and Trade Co., Ltd. manufactures and supplies industrial-grade hardware accessories engineered for piping systems, pressure vessels, structural steelwork, and municipal infrastructure. Our production capabilities cover cold forging, hot forging, precision CNC machining, and surface anti-corrosion treatments, serving global distributors, EPC contractors, and OEM equipment manufacturers.

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Product Range

High-Strength Industrial Fasteners

Hex bolts, stud bolts, full-thread rod studs, and heavy hex nuts manufactured to Grade 8.8, Grade 10.9, ASTM A325, and ASTM A193 B7 standards.

Anchoring & Structural Bolts

Heavy-duty expansion bolts, wedge anchors, and Grade 8.8 hot-dip galvanized U-bolts designed for concrete foundations and pipe support anchoring.

Industrial Pipe Flanges

Forged slip-on (SO), weld neck (WN), socket weld (SW), threaded (NPT/BSPT), and lap joint flanges in carbon steel and austenitic stainless steel (SS304 / SS316).

Fluid & Flange Sealing Solutions

Semi-metallic spiral wound gaskets with V-shaped metallic strip and flexible graphite or PTFE fillers, built for high-pressure and elevated-temperature sealing.

Materials & Technical Specifications

Category	Parameter	Specifications
Hex Bolts & Studs	Standard / Grade	DIN 933, ANSI B18.2.1, ASTM A193
Hex Bolts & Studs	Material Options	Carbon Steel, Alloy Steel (B7), SS304, SS316
Hex Bolts & Studs	Size / Dimension Range	M6–M64 / 1/4 inch–2-1/2 inch
Hex Bolts & Studs	Surface Finish Options	Plain, Zinc Plated, Hot-Dip Galvanized (HDG), Black Oxide
Expansion & U-Bolts	Standard / Grade	DIN 975, ASTM A325, ISO 898-1
Expansion & U-Bolts	Material Options	Medium Carbon Steel (Q235, 45#), Grade 8.8 / 10.9
Expansion & U-Bolts	Size / Dimension Range	M8–M36 / Pipe OD 21 mm–325 mm
Expansion & U-Bolts	Surface Finish Options	Hot-Dip Galvanized (>= 55 um), Electro-Zinc
Forged Flanges	Standard / Grade	ANSI/ASME B16.5, EN 1092-1, DIN
Forged Flanges	Material Options	A105, SS304/304L, SS316/316L, Ductile Iron
Forged Flanges	Size / Dimension Range	DN15–DN600 (1/2 inch–24 inch) / Class 150–900, PN10–PN40
Forged Flanges	Surface Finish Options	Anti-rust Yellow/Black Paint, Rust-proof Oil, Galvanized
Spiral Wound Gaskets	Standard / Grade	ASME B16.20, EN 1514-2
Spiral Wound Gaskets	Material Options	Inner/Outer Ring: CS, SS304, SS316; Filler: Graphite, PTFE
Spiral Wound Gaskets	Size / Dimension Range	DN15–DN1200 / Class 150–1500
Spiral Wound Gaskets	Surface Finish Options	Natural, Zinc Coated Carbon Steel Outer Rings

Manufacturing Standards & Quality Control

Every production batch undergoes structured quality verification steps to verify dimensions, thread pitch, and material specs prior to dispatch:

Standard Compliance: Manufacturing follows ASME, ANSI, DIN, EN, ISO, and BS specifications.

Material Traceability: Spectrometric chemical analysis is performed on incoming raw steel. Mill Test Certificates (MTC) conforming to EN 10204 3.1 are provided with all shipments.

Coating Thickness Control: Hot-dip galvanizing maintains an average coating thickness of >= 55 um, tested under salt spray conditions for outdoor and coastal applications.

Dimensional & NDT Inspection: Thread verification using Go/No-Go plug and ring gauges. Forged flanges undergo ultrasonic testing (UT) and hydrostatic pressure testing where specified.

Customization & Supply Options

Custom Fabrication

Non-standard thread pitches, extended length stud bolts, custom bolt hole patterns on flanges, and special alloy materials (such as Duplex SS, Cr-Mo steel).

OEM Branding & Marking

Custom heat numbers, steel grade stamps, manufacturer logos, and customized inner box / carton packaging.

Minimum Order Quantity (MOQ)

Production runs starting from 500 pcs for standard fasteners; trial orders accepted for non-standard items.

Lead Time & Logistics

Standard stock items ship within 7 to 10 days. Custom forged or hot-dip galvanized production batches typically require 20 to 30 days. Shipping terms include FOB Tianjin/Qingdao, CIF, or DDP to destination ports.

Our Factory

FAQ

Q: Can you provide EN 10204 3.1 Mill Test Certificates for bulk hardware shipments?

A: Yes. Every shipment includes a 3.1 Mill Test Certificate covering chemical analysis, tensile strength, yield strength, elongation, and hardness test results corresponding to the raw material heat numbers.

Q: What is the typical hot-dip galvanized (HDG) coating thickness on your expansion bolts and studs?

A: Our standard HDG process yields an average coating thickness of 55 microns (390 g/m2), complying with ASTM A153 and ISO 1461 requirements for outdoor corrosion protection.

Q: How do you verify thread compliance on Grade 10.9 fasteners and stainless steel stud bolts?

A: We maintain strict pitch tolerances post-coating and apply anti-seize protective oils or wax treatments upon request. Thread clearance is verified using standard Go/No-Go thread gauges after surface treatment processing.

Q: Do your flanges conform to ASME B16.5 pressure ratings and flange face dimensions?

A: Yes. Forged steel flanges match ASME B16.5, ASME B16.47, or EN 1092-1 specifications for hub thickness, bolt circle diameter, raised face (RF) height, and face finish roughness.

Q: What filler materials are available for your spiral wound flange gaskets?

A: We supply flexible graphite fillers for high-temperature service up to 450 deg C, and PTFE fillers for corrosive chemical applications operating under lower thermal ranges.

Q: What is the lead time for custom non-standard hardware items produced from client drawings?

A: Drawing review and sample production require 7 to 10 working days. Mass production is completed within 20 to 25 days following sample approval and deposit receipt.

Request a Quote

Need high-strength fasteners, pipe flanges, or custom hardware accessories for your procurement cycle? Send us your material grades, sizes, quantities, and technical drawing files.
Direct Email: anzhiyuan@yhmadeinprc.com.cn
Required Inquiry Details: Item description, size/dimension, material grade, coating specs, and target order quantity.
Response Time: Technical specification verification and commercial quotations provided within 12 hours.

We're well-known as one of the most experienced hardware accessories manufacturers in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy discount hardware accessories in stock here from our factory. Contact us for pricelist and free sample.