The following is available in its entirety on the Canada Border Services Agency website.
Carbon and Alloy Steel Line Pipe – Notice of Preliminary Determination
Provisional duties will now be payable on the subject goods that are released from customs on or after September 6, 2017.
Note that the HS code is for convenience of reference only. Refer to the product definition for authoritative details regarding the subject goods.
The subject goods are usually classified under the following Harmonized System (HS) classification numbers (codes):
Prior to January 1, 2017, the goods in question were usually classified under the following HS codes:
7304.19.00.11
7304.19.00.12
7304.19.00.21
7304.19.00.22
7305.11.00.11
7305.11.00.19
7305.12.00.11
7305.12.00.19
7305.19.00.11
7305.19.00.19
7306.19.00.10
7306.19.00.90
Beginning January 1, 2017, under the revised customs tariff schedule, subject goods would usually be imported under the following HS codes for line pipe:
7304.19.00.10
7304.19.00.20
7305.11.00.10
7305.11.00.20
7305.12.00.10
7305.12.00.30
7305.19.00.10
7305.19.00.20
7306.19.00.10
7306.19.00.90