How is the painting process handled?

After shot-blast cleaning, spraying anti-rust paint, then spray paint. For cab and electrical device box, acid cleaning and parkerising are done, then painting, to ensure a long usage life.

Qtz Series Tower Crane Qtz50 (5008)

Name: Internal Climbing Tower Crane/Self-Erecting Tower Crane/Qtz Series Tower Crane Qtz50 (5008)
Brand: Jinan Sanyisan International Trading Co., Ltd.
SKU: 696696512

Shandong, ChinaJinan Sanyisan International Trading Co., Ltd.

US$1.00

1 Piece

Product profile

Customization

Available

After-sales Service

24 Hours

Warranty

1 Year

Model NO.

QTZ50(5008)

Certification

CE, CE, ISO9001: 2000

Condition

New

Maximum Lifting Height

>250m

Maximum Lifting Weight

>10t

Installation

Jack-Up

Moving Type

Fixed

Type

Top-Slewing Crane

Brand Name

Mingwei

Color

Red/White/Blue/Orange

Free Standing Height

30m

Max. Height

120m

Jib Length

3-50m

Main Body Material

Q345b

Main Body Type

160X160X12

Size of Mast Section

1500X1500X2200

Total Power

25.9kw

Balanced Weigh

8.2t

Application

Container Usage, Mineral Area Usage

Power Source

Electric

Sling Type

Wire Rope

Tower Crane Type

Slewing Tower Crane

Main Girder Form

Double Girder

Transport Package

Containers

Specification

CE ISO9001: 2000

Trademark

MINGWEI

Origin

China

HS Code

8426000

Production Capacity

200 Units /Month

Key features

High-Quality Materials: Uses Shanghai Baosteel 16M and Q235B steel with shot-blast cleaning and anti-rust painting.

Rigorous Quality Testing: Each device undergoes strict testing before shipment to minimize post-factory issues.

Professional After-Sales Support: Engineers with 20+ years experience provide installation guidance and maintenance training.

Custom Design Capability: Special design available based on customer building drawings to solve specific project problems.

Fast Custom Delivery: Design amendments take one week; special project delivery time is approximately 30-40 days.

One-Year Warranty: Comprehensive one-year warranty for the complete machine with free engineer service for defects.

Heavy-Duty Structure: Total weight is 3-5 tons heavier than similar cranes, ensuring higher safety and stability.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceMulti-language Pioneer

Jinan Sanyisan International Trading Co., Ltd.

Shandong, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 Years CertifiedNearest Port: Qingdao PortAverage Response Time: >24h

AI-Powered supplier vetting

SummaryThe supplier appears to be a construction machinery manufacturer focused on tower cranes, with a reported 20,000-square-meter production workshop, 300 specialized production units, and annual output of more than 5,000 cranes. It provides broad customization and ODM services, and reports OEM service for well-known brands. The company has operated in export markets for 13 years, with exports representing 31%–40% of total sales, although exports are conducted through agents. After-sales coverage is supported by 20 domestic offices and a service-tracking group. Key limitations include no reported inventory, overseas warehouse, showroom, or overseas branch/agent capability. No new products were reported in the past year, while SDK availability indicates some R&D support. Financial records are indicated for 2020–2022, but their actual results are not provided. Certification, formal environmental documentation, and fire-drill status cannot be verified from the supplied information.

Supplier typeThe supplier’s stated business scope includes sales of construction machinery and related products, while its company profile identifies a large crane production workshop and annual crane output exceeding 5,000 units. This supports classification as a construction-machinery manufacturer and trader, with tower cranes as its apparent core product.

After-Sales capabilityThe supplier reports 20 domestic offices and an after-sales service group that tracks service, indicating established domestic support. However, it reports no overseas warehouse, showroom, or overseas agent/branch service capability; peak-season lead time is one month, and its service-capability assessment process lacks a written procedure.

Production capacityThe supplier reports a 20,000-square-meter production workshop, 300 specialized production units, and annual production of more than 5,000 cranes. Reported lead times are within 15 working days in the off-season and one month during peak season, supporting substantial production capacity.

Customization capabilityThe supplier lists customization from samples, designs, and full customization, along with minor and flexible customization. It also reports ODM service, providing explicit evidence of broad customization capability.

Product Q&A

Q:Can you provide customized products?

Yes. We are a hi-tech enterprise affiliated to China Academy of Building Research. We have a group of engineers, who have title of professor,senior engineer and engineer. We can give you special design as per the drawings of your building, helping you solve different problems faced in your projects.

Q:How long does customized product design and manufacture take?

Not exactly. Normally for us, some amendment in design to adapt your requirement will take one week. so even for your special project, it will be about 30-40 days delivery time.

Q:What kind of services do you provide?

We are dealing with construction machinery for about 15 year. High quality is our advantage, and high technology is our core competency. We ensure that all the machine have been completely tested in our factory before delivery. We will give you one year warranty for complete machine. For problems caused by our production defect, we will provide you free services by sending skilled engineer there.

Q:What is the warranty period for the tower crane?

We provide a one-year warranty for the complete machine. For problems caused by our production defect, we will provide free services by sending a skilled engineer.

Q:What materials are used for the main structure?

The using steel is 16M and Q235B which the manufacture is Shanghai Baosteel. After test for qualified, then can use.