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The differences between petroleum inspectors and certified welding inspectors can be seen in a few details. Each job has different responsibilities and duties. Additionally, a petroleum inspector has an average salary of $48,415, which is higher than the $47,494 average annual salary of a certified welding inspector.
The top three skills for a petroleum inspector include regular communication, API and ladders. The most important skills for a certified welding inspector are CWI, PT, and structural steel.
| Petroleum Inspector | Certified Welding Inspector | |
| Yearly salary | $48,415 | $47,494 |
| Hourly rate | $23.28 | $22.83 |
| Growth rate | -3% | -3% |
| Number of jobs | 17,162 | 50,814 |
| Job satisfaction | 3 | - |
| Most common degree | Bachelor's Degree, 32% | Associate Degree, 31% |
| Average age | 45 | 45 |
| Years of experience | - | - |
Petroleum Inspectors are responsible for examining petroleum shipments to ensure they meet contract specifications. Their duties include examining samples during petroleum tank transfer for water or discoloration, withdrawing samples from the petroleum tank, and conducting laboratory analysis on bottled, stored samples. They also use calibration tables to quantify consignments and sounding shore tanks using steel tape. Petroleum inspectors may conduct calibration on meters and tanks. Petroleum inspectors ensure that shipments passing through adhere to performance and safety regulations.
A certified welding inspector is primarily in charge of inspecting welding works, ensuring its' strength and quality. Their responsibilities also entail checking safety equipment and materials, understanding project requirements, testing welds to ensure it functions according to its purpose, and evaluating the daily operations of welders to ensure that they adhere to the safety standards and regulations while operating various tools and equipment. Moreover, a certified welding inspector also helps welders by developing welding techniques to optimize operations, teaching the correct welding practices, and maintaining the cleanliness of work areas.
Petroleum inspectors and certified welding inspectors have different pay scales, as shown below.
| Petroleum Inspector | Certified Welding Inspector | |
| Average salary | $48,415 | $47,494 |
| Salary range | Between $29,000 And $78,000 | Between $31,000 And $72,000 |
| Highest paying City | Linden, NJ | - |
| Highest paying state | Connecticut | - |
| Best paying company | Intertek | - |
| Best paying industry | Technology | - |
There are a few differences between a petroleum inspector and a certified welding inspector in terms of educational background:
| Petroleum Inspector | Certified Welding Inspector | |
| Most common degree | Bachelor's Degree, 32% | Associate Degree, 31% |
| Most common major | Business | Precision Metal Working |
| Most common college | - | - |
Here are the differences between petroleum inspectors' and certified welding inspectors' demographics:
| Petroleum Inspector | Certified Welding Inspector | |
| Average age | 45 | 45 |
| Gender ratio | Male, 95.7% Female, 4.3% | Male, 89.0% Female, 11.0% |
| Race ratio | Black or African American, 13.6% Unknown, 4.2% Hispanic or Latino, 24.0% Asian, 7.7% White, 49.6% American Indian and Alaska Native, 0.7% | Black or African American, 11.7% Unknown, 4.6% Hispanic or Latino, 17.2% Asian, 8.1% White, 57.6% American Indian and Alaska Native, 0.8% |
| LGBT Percentage | 4% | 4% |