# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001437749-22-006431
Filing Date
2022-03-16
Accepted
2022-03-16 16:18:04
Documents
109
Period of Report
2021-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | FORM 10-K | nwpx20211231_10k.htm iXBRL | 10-K | 2056850
2 | EXHIBIT 3.1 | ex_341631.htm | EX-3.1 | 21004
3 | EXHIBIT 21.1 | ex_337402.htm | EX-21.1 | 4468
4 | EXHIBIT 23.1 | ex_337407.htm | EX-23.1 | 2886
5 | EXHIBIT 31.1 | ex_337408.htm | EX-31.1 | 13181
6 | EXHIBIT 31.2 | ex_337409.htm | EX-31.2 | 13195
7 | EXHIBIT 32.1 | ex_337410.htm | EX-32.1 | 4884
8 | EXHIBIT 32.2 | ex_337411.htm | EX-32.2 | 5020
14 |  | graph01.jpg | GRAPHIC | 45135
| Complete submission text file | 0001437749-22-006431.txt |  | 10824388

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
9 | XBRL TAXONOMY EXTENSION SCHEMA | nwpx-20211231.xsd | EX-101.SCH | 88799
10 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE | nwpx-20211231_cal.xml | EX-101.CAL | 92507
11 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE | nwpx-20211231_def.xml | EX-101.DEF | 598083
12 | XBRL TAXONOMY EXTENSION LABEL LINKBASE | nwpx-20211231_lab.xml | EX-101.LAB | 537644
13 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE | nwpx-20211231_pre.xml | EX-101.PRE | 647733
103 | EXTRACTED XBRL INSTANCE DOCUMENT | nwpx20211231_10k_htm.xml | XML | 2021800

Mailing Address 201 NE PARK PLAZA DRIVE SUITE 100 VANCOUVER WA 98684
Business Address 201 NE PARK PLAZA DRIVE SUITE 100 VANCOUVER WA 98684 3603976250
NORTHWEST PIPE CO (Filer) CIK: 0001001385 (see all company filings)

EIN.: 930557988 | State of Incorp.: OR | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-27140 | Film No.: 22745099
SIC: 3317 Steel Pipe & Tubes