How should lifting chains be inspected and maintained?

Daily visual inspection for wear, nicks, stretch, or corrosion is mandatory. Use a go/no-go gauge for elongation. Clean debris and apply oil. Maintain an inspection log for each sling.

What is your MOQ (Minimum Order Quantity)?

Standard Chain Slings: MOQ 50 pieces. Bulk Chain by the Meter: MOQ 1,000 meters. Custom OEM Assemblies: MOQ 100 pieces (negotiable).

What is the lead time?

Standard Slings: 20-30 working days. Custom/Certified Orders: 35-45 working days.

Factory Sales Heavy Duty Black Painted En818-2 Lifting/Mining Rigging Link Chain

Name: Factory Sales Heavy Duty Black Painted En818-2 Lifting/Mining Rigging Link Chain
Brand: Weifang Shengao Machinery Co., Ltd.
SKU: 694434482

Shandong, ChinaWeifang Shengao Machinery Co., Ltd.

US$0.59-2.99

1 Meter

Sample price:US$0.99/meter.Request sample

Product profile

Customization

Available

Usage

Transmission Chain, Drag Chain, Conveyor Chain, Dedicated Special Chain

Material

Iron

Model NO.

SA-LT

Surface Treatment

Polishing

Feature

Fire Resistant

Chain Size

1/2"*3/32"

Structure

Welded Chain

Color

Solid Color

Item

Chain

Raw Material

Stainless Steel, Alloy Steel

Function

Lifting/Conveyor Chain

Diameter

Diameter From 6mm to 42mm

Brand Name

Shengao, OEM

Standard or Nonstandard

Nonstandard

Factory

Over 15 Years Experience in Producing

OEM

Available

Dimension

10-100mm

Certificates

SGS, ISO9001:2015

OEM Service

Yes

Custom Made

Yes

Logo Printing

Customized

MOQ

1ton

Free Sample

Yes

Transport Package

Plywood Box

Specification

SGS

Trademark

Shengao

Origin

Weifang City, Shandong Province, China

HS Code

87089910

Production Capacity

5000PCS/Month

Key features

High-Performance Alloy Steel: Manufactured from heat-treated alloy steel for superior abrasion resistance and load lifting.

Customizable Dimensions: Diameter adjustable from 6mm to 42mm; Length and width of chain links are customizable.

Multiple Surface Treatments: Available in black tempered, electro galvanized, hot dip galvanized, and painted finishes.

Comprehensive OEM Service: In-house tooling design and fabricating capabilities for full customization and logo printing.

Wide Standard Compliance: Meets EN818-2, ISO3077, JIS, US federal, DIN, and ASME B30.9 standards.

Free Sample Availability: Free samples provided; freight charges apply before the first order.

Fast Response Time: Inquiries are replied to within 12 hours with professional engineering support.

Competitive Pricing: Professional tooling and process optimization ensure cost-effective solutions.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

Weifang Shengao Machinery Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2010-04-06 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.96h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryWeifang Shengao Machinery Co., Ltd. is a limited company focused on mechanical parts, hardware, metal tools, CNC machine tools, and related components. It identifies as a professional technical supplier and offers 3D software design and broad customization services, including sample-, design-, full-, minor-, and flexible customization. The supplier has written procedures and records for service assessment, corrective actions, and complaint handling. Its export sales share is stated at 71%–90%, with three years of export experience. However, the supplier has nine employees, only two years of total R&D engineer experience, no new products in the past year, no ODM, SDK, or overseas service infrastructure, and no stated customer cases. Audit information is provided for a TUV Rheinland audit with a validity period from September 4, 2025 to September 3, 2026, but the evaluation result is recorded as 0 and no certification name is specified.

Supplier typeThe supplier explicitly identifies as a professional technical supplier and a limited company. Its stated business and product scope covers mechanical parts, hardware products, metal tools, CNC machine tools, functional components, forgings, and powder metallurgy products; the audit record identifies mechanical parts as the primary product.

After-Sales capabilityThe supplier has clear written procedures and followed records for corrective and preventive actions and for handling customer complaints. This directly supports an established service-response process, although the slices do not provide service performance results or response-time data.

Production capacityThe supplier reports an annual production output range, six to ten quality-control staff, on-time delivery, random production quality inspection, and its own factory. It has nine total employees, so the available evidence supports an operating production capability, while capacity beyond the stated output range cannot be determined.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization, and also welcomes OEM and ODM requests according to its company description. These repeated statements provide direct evidence of broad customization coverage, although the separate record states that ODM is not available, creating a conflict on ODM specifically.

Product Q&A

Q:What types of lifting chains do you manufacture?

We specialize in high-performance alloy steel lifting chains for industrial applications: Grade 80 & Grade 100 Alloy Lifting Slings, Single/Double/Triple/Quad Leg Slings, Endless (Grommet) Slings, and Welded & Mechanical Assembly Lugs.

Q:What is the difference between Grade 80, Grade 100, and Grade 30/43?

Grade 30/43 is for general purpose (tie-downs, towing) and NOT for overhead lifting. Grade 80 is the standard for overhead lifting. Grade 100 is high-performance, stronger than Grade 80, allowing smaller diameter for the same load.

Q:How is the Working Load Limit (WLL) determined?

WLL is calculated as Minimum Breaking Force (MBF) divided by Safety Factor. For Grade 80 and 100, the standard safety factor is 4:1 (or 5:1 depending on regional standards). WLL is derated based on sling angle.

Q:How do I select the correct chain size and configuration?

Selection requires knowing the weight of the load, lifting configuration (angle), type of hitch (Basket, Choker, Vertical), and environment. We recommend consulting a qualified rigger or using our online WLL calculator.

Q:How do I request a quote?

Please provide: Chain Grade (80 or 100) and Diameter, Sling Configuration and Length, Required WLL or load details, Type of end fittings, and any required certifications.