Mitr Steel has developed continuously our production line in every productionprocedure to confirm that our customer will receive total qualified products to international standard


Our strong commitment to maintain the highest quality standard products has earned us the supporting from BOI Promotion Privilege, the attainment of ISO 9001:2015 Certificate and Underwriters Laboratories Inc. : Standard Certification for Metallic Sprinkler Pipe, as well as receiving the permission to display Thailand Industrial Standard (TIS) marking TIS 427, TIS 276, TIS 277 and TIS 107 marked on all our products.

Furthermore Mitr Steel Co., Ltd., the leader of carbon steel tubular pipe manufacturer and trader in Thailand, has attained to Made in Thailand (MiT) certificate which has qualification and properties that governed by The Federation of Thai Industries in order to promote and support Thai products.

Our products such as round pipe, square pipe, rectangular pipe and light lipped channel are manufactured by Thai company in Thailand with international standard. In consequence, our products with Made in Thailand marking can advantage and support steel and construction industries in Thailand.

Mitr Steel intentionally pushes forward and support Thai construction industries with Mitr Steel products which are internationally qualified manufacture and quality control.

The ISO 9001:2015 quality management system, certified by the united Kingdom Accreditation Service (UKAS)

The ISO 9001:2015quality management system, certified by the National Accreditation Council of Thailand

Underwriters Laboratories Inc. : Standard Certification for Metallic Sprinkler Pipe

MiT (Made in Thailand) certificate, certified by The Federation of Thai Industries

Standards : specification

Thailand Industrial Standard

TIS 427

TIS 276

TIS 277

TIS 107 

TIS 1228

International Standard

JIS G 3444 (STK 400)

JIS G 3452

JIS G 3457

JIS G 3466 (STKR 400)

ASTM A 53 (120) Grade A or B

ASTM A 53 - 87b

ASTM A 500: 1995

DIN 2440/2441

AWWA C 200

BS 534

BS 1387: 1985 (Class: L,M,H)