Guides
Practical Steel Pipe Knowledge
Short, useful pieces written by our factory team.
Specs
11 Jan 2026
•
5 min read
How to read a steel pipe spec sheet: JIS vs ASTM grades
What STKM, STPG and A53 each cover, how the grades differ, and which fields to specify in your RFQ.
TONGXING Team
Steel Pipe Factory
Materials
18 Jan 2026
•
4 min read
Six things to prepare before you request a quote
Grade, outer diameter, wall thickness, length, quantity and surface finish, plus drawings, so the first quote is the right one.
TONGXING Team
Steel Pipe Factory
Buying
25 Jan 2026
•
6 min read
What is an MTC/TC, and how do you ask for one?
What a mill test certificate records, the fields buyers should check, and how it ships with the order.
TONGXING Team
Steel Pipe Factory