ASTM A500/JIS/EN Rectangular hollow section

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Product Name	rectangular hollow section/ RHS
Size	Size:	1010--500500mm
	Thickness:	0.45--16mm
	Length:	3-12m
Steel Grade	Q195,Q215,Q235,Q345,16Mn, 20#
Standard	ASTM A500,EN10219,GB/T6728,GB/T6725,JIS G3466
Usage	1. For Structure, Airport, Railway 2. Construction and so on.
Ends	Plain end or By Your Choice
Surface	Bared Or With Oiled Or Galvanized
Technique	ERW ,Hot Rolled and Cold Rolled
Section Shape	Rectangular
Inspection	With Hydraulic Testing, Eddy Current , Infrared Test
Package	Bags, Bundle, In Bulk, Containers
MOQ	20 Metric Ton / Can Be Negotiated
Supply Ability	15,000 Metric Ton/Month
Date of Delivery	7 days(Qty within 1000 Metric Ton) or According To The Quantity
Port of Shipment	Tianjin, China
Payment	L/C T/T

Q: What are the common protective coatings used on the inner surface of steel pipes?: The common protective coatings used on the inner surface of steel pipes include epoxy, polyurethane, and cement mortar coatings. These coatings provide corrosion resistance, prevent the formation of scales, and improve the durability and lifespan of the pipes.

Q: How are steel pipes measured?: Steel pipes are typically measured by their outside diameter (OD) and wall thickness. The OD is measured using a caliper or tape measure, while the wall thickness is determined by a gauge or ultrasonic testing. These measurements are crucial in determining the appropriate size and strength of a steel pipe for various applications.

Q: What are the different methods of protecting steel pipes from external damage?: There are several methods of protecting steel pipes from external damage, including coating the pipes with a corrosion-resistant material such as epoxy or polyethylene, applying a layer of protective tape, installing a cathodic protection system, using concrete or rock shielding, and implementing measures to prevent soil movement or impact damage.

Q: How are steel pipes used in the pharmaceutical industry?: Steel pipes are commonly used in the pharmaceutical industry for various purposes, such as transporting liquids and gases, transferring raw materials and finished products, and providing a reliable and durable infrastructure for the pharmaceutical manufacturing process.

Q: How do you calculate the pipe buoyancy for steel pipes in water?: The buoyancy of steel pipes in water can be calculated by determining the weight of the water displaced by the submerged portion of the pipe. This can be done by multiplying the volume of the submerged portion of the pipe by the density of water. The buoyant force acting on the pipe can then be calculated by multiplying the weight of the displaced water by the acceleration due to gravity.

Q: Difference and application of seamless hot rolled pipe and cold drawn pipe in seamless steel tube: type3.1, seamless steel pipe according to the different production methods can be divided into hot-rolled pipe, cold rolled tube, cold drawn tube, extrusion tube and so on3.2, according to the shape of the classification of circular tubes, special-shaped tubes of the division, except the square tube and rectangular tube, there are elliptical tube, semicircle tube, triangle tube, hexagonal tube, convex shaped tube, plum shaped tube and so on3.3, according to the different material, divided into ordinary carbon structure tube, low alloy structure tube, high quality carbon structure tube, alloy structure tube, stainless steel tube and so on3.4, according to special use, there are boiler tubes, geological pipes, oil pipes and so on

Q: What are the factors affecting the durability of steel pipes?: There are several factors that can affect the durability of steel pipes. These include corrosion, temperature fluctuations, mechanical stress, and exposure to chemicals or abrasive materials. Additionally, the quality of the steel used in the pipes, the design and construction of the piping system, and proper maintenance and inspection practices can also impact their durability.

Q: Can steel pipes be recycled after their useful life?: Steel pipes can indeed be recycled once they have served their purpose. Steel, being an incredibly recyclable substance, can be recycled even in the form of pipes. The recycling of steel pipes entails the collection of used pipes, followed by thorough cleaning to eliminate any impurities, and finally transforming them into fresh steel products. This recycling process contributes to the preservation of natural resources, curbs energy usage, and limits waste generation. Moreover, recycling steel pipes aids in mitigating the environmental repercussions linked to the manufacturing of new steel.

Q: What are the different types of steel pipe connections for fire sprinkler systems?: There are several types of steel pipe connections used in fire sprinkler systems including threaded connections, grooved connections, flanged connections, and welded connections.

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