China Ms Square Tube Q235 Manufacturer, Factory

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China Ms Square Tube Q235 Manufacturer, Factory

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Product Description

Product description:

Product name	hollow section square tube
Wall Thickness	0.7mm–13mm
Length	1–14m According to customer requirements …
Outer Diameter	20mm20mm—400mm400
Tolerance	Tolerance based on Thickness: ±5～±8%; According to customer’s request
Shape	square
Material	Q195—Q345, 10#, 45#, S235JR, GR.B-D, STK500, BS1387……
Surface treatment	black
factory	yes
Standard	ASTM, DIN, JIS, BS
Certificate	ISO, BV, CE, SGS
Payment terms	30% T/T deposit in advance, 70% balance after B/L copy;
Delivery times	25 days after receive ur deposits
Package	Through a bundle According to customer’s requirement
Loading port	Tianjin/Xingang

What benefits do customers get:

We are factory. (Our price will have an advantage over trading companies.)
Don’t worry about the delivery date. We are sure to deliver the goods in time and quality to achieve customer satisfaction.

Product photos:

Different from other factories:

We applied for received 3 patents (Groove pipe, Shoulder pipe, Victaulic pipe).
Port: Our factory just 40 kilometers from Xingang port, is biggest port in the north of China.
Our manufacturing equipment include 4 pre-galvanized products lines, 8 ERW steel pipe product lines, 3 hot-dipped galvanized process lines.

Customer case:

Australian customer purchase powder coating pre galvanized steel square tube. After customers receives the goods for the first time. Customer tests adhesive strength between the powder and the surface of the square tube. Customers test powder and square surface adhesion is small. We have meetings with customers to discuss this problem and we do tests all the time. We polished the surface of the square tube. Send the polished square tube to the heating furnace for heating. We tests all the time and discuss with customer all the time. We keep finding ways. After many tests, the final customer is very satisfied with the products. Now customer purchase a large number of products from factory every month.

Customer photos:

The customer purchased steel pipes in our factory. After the goods were produced, the customer came to our factory for inspection.

Produce products:

Hot-dipped-Galvanized-Steel-Pipe-Square-Tube

Frequently Asked Questions (FAQ)

What are the main specifications of your hollow section square tubes?

Our square tubes are available in wall thicknesses ranging from 0.7mm to 13mm, and outer diameters from 20mm*20mm to 400mm*400mm. The length can range from 1 to 14 meters according to specific customer requirements.

What materials and standards do your steel tubes conform to?

We manufacture square tubes using materials such as Q195—Q345, 10#, 45#, S235JR, GR.B-D, STK500, and BS1387. They comply with international standards including ASTM, DIN, JIS, and BS.

Are you a direct factory or a trading company?

We are a direct manufacturing factory. This allows us to provide a distinct pricing advantage over trading companies and ensure reliable quality control and timely delivery.

What certificates do your square steel tubes hold?

Our products and factory processes are fully certified under major international standards, including ISO, BV, CE, and SGS certifications.

How do you handle custom quality requirements and surface treatment issues?

We work closely with customers to test and resolve issues. For example, for an Australian customer facing powder adhesion issues, we conducted extensive testing, polished the tube surface, and heated it in a furnace to ensure perfect coating adhesion. We also hold 3 specific patents (Groove pipe, Shoulder pipe, Victaulic pipe) to meet diverse needs.

What are your payment terms, delivery times, and shipping arrangements?

We accept a 30% T/T deposit in advance, with the remaining 70% balance due after receiving the B/L copy. Delivery takes approximately 25 days after the deposit is received. Shipments are loaded at Tianjin/Xingang port, which is only 40 kilometers from our factory.