Pipeline and Hazardous Materials Safety Administration
East Building, PHH-25
1200 New Jersey Avenue, Southeast
Washington, D.C. 20590
APPROVAL CA2024110502
REVISION 0
ISSUED BY THE COMPETENT AUTHORITY OF THE UNITED STATES
EXPIRATION DATE: February 14, 2028
APPROVAL HOLDER:
Keystone Vessel Manufacturing Co., Ltd.
No.333 Youyi Second Road, Suixian Economic Development Zone, Suizhou City
Hubei Province 441315 People's Republic of China
REGULATORY AUTHORITY: 49 CFR § 178.69, 178.70 and 178.71(f)
SYNOPSIS:
Keystone Vessel Manufacturing Co., Ltd. is authorized to manufacture the following specification cylinders UN ISO 18172-1 and UN ISO 21172-1 drawing numbers: KSC40L-00, Rev. 1, UNISO 18172-1:2007 and KSC450B-00, Rev. 1, UNISO 21172-1:2015 by the Gas Metal Arc Weld manufacturing method, at the facility located at the address above, under the supervision of the Independent Inspection Agency identified under section 5 (b) of this approval. The Chemical Analysis is performed at Wuhan Measurement & Test Co., Ltd located at No.66 Xinggu Road, Shuangliu Steet Xinzhou District, Wuhan, Hubei Province, People's Republic of China. This approval is a Conditional Approval for 2½ years to allow for PHMSA to conduct an onsite fitness inspection of the facility.
BASIS:
This approval is issued in response to Keystone Vessel Manufacturing Co., Ltd.'s Application dated November 05, 2024, requesting a Competent Authority approval to manufacture UN ISO 18172-1 and UN ISO 21172-1 cylinder specifications.
Safety Specifications for High-Purity Dichlorosilane (SiH₂Cl₂)
High-Purity Dichlorosilane (chemical formula: SiH₂Cl₂) is an important electronic-grade silicon-containing chemical raw material, mainly used in high-tech fields such as semiconductors and photovoltaics for the preparation of high-purity silicon, epitaxial films and silicon-based materials. Its purity is usually required to be ≥99.999% (5N) or higher, and the content of impurities (such as metal ions, moisture, and other chlorosilane derivatives) must be strictly controlled below the ppm level. Due to its dangerous characteristics of flammability, toxicity, and corrosiveness, as well as its high chemical reactivity, strict compliance with professional safe operation and regulatory management requirements is essential. The following is a detailed explanation of its core information and key specifications:
Address: R 23, F4,New Factory (4), B1, Phase II, Dashu Industrial Village , Liufang Street ,Wuhan East Lake Hi-tech Development Zone, Wuhan City, Hubei Province,P.R.China
Keystone Vessel Manufacturing Co., Ltd
Add :No. 333 Youyi Second Road, Suixian Economic Development Zone, Suizhou City, Hubei Province, P.R.China Phones: +86-152-7135-7675 https://ks-vessel.com Email: isotanks@foxmail.com jin@ks-vessel.com
Keystone Vessel Manufacturing (M) Sdn. Bhd.
Add:PT 25466, 25467 & Lot 18869, Batu 5 1/2, Jalan Kuala Sawah, 70300 Seremban, Negeri Sembilan, Malaysia.
