Soon after horrific natural gas explosions killed five people in Allentown and a utility worker in Philadelphia, a Pennsylvania congressman called a hearing in March to talk about improving pipeline safety.

Right away, U.S. Rep. Bill Shuster made one thing clear: He wasn't sure the solution was more federal inspectors, or even a more powerful U.S. pipeline safety agency with tougher regulations.

"I believe we can do more with less," he told reporters covering the hearing in King of Prussia.

Shuster's opinion counts. The Republican from south-central Pennsylvania is the new chairman of the House subcommittee on railroads, pipelines, and hazardous materials - making him one of the most powerful members in Congress on the issue of pipeline regulation.

He says the rules should encourage natural gas development, not get in the way. That's particularly true in Pennsylvania, he says, where the Marcellus shale industry is transforming the state's economy.

And the best guarantee of pipeline safety, he says, is the expertise of the companies themselves.

"They want their pipelines to be safe," Shuster said during an interview with The Inquirer, pointing out that "they have spent billions of dollars on these things."

"Are there bad actors out there?" he asked rhetorically. "Sure, but I think they're few and far between."

Shuster is generally skeptical about handing over more authority or more jobs to the Pipeline and Hazardous Materials Safety Administration, or PHMSA, the small agency that enforces U.S. pipeline rules.

"These regulatory agencies don't have the answer to everything," Shuster said. "They're not always right."

Shuster showed his new clout this year, as Congress took up a new pipeline-safety bill. The Senate and another House committee, both with widespread support, passed similar drafts that significantly toughened regulations.

Then Shuster proposed his own bill, scaling back many of those initiatives and scrapping others entirely.

Rick Kessler, who handles Washington lobbying for the Pipeline Safety Trust, said he was surprised Shuster's bill even gained traction, given recent gas explosions in San Bruno, Calif., and Allentown that together killed 13 people.

"It is amazing to me that is even up for discussion," Kessler said this fall.

After some tough negotiations, Shuster reached a deal with other leaders in the House and Senate on Thursday. As a result of his intervention, the maximum fine was rolled back from $2.5 million per violation to $2 million and the number of new PHMSA positions was cut back.

Carl Weimer, executive director of the safety trust, endorsed the bill but remained disappointed the stronger versions didn't pass.

Democrats on the committee praised the "bipartisan work" that went into the final version.

Shuster, 50, represents a heavily Republican, largely rural slice of the state bordering the Marcellus gas play that includes Altoona and Hollidaysburg.

His father was longtime U.S. Rep. Bud Shuster, who was famous for his ability to snare highway money and earmarks. When Bud Shuster stepped down 10 years ago, he helped steer the party's endorsement to his son, who had run the family's Chrysler dealership.

Bill Shuster soon established a reputation as a reliably conservative member of Congress, earning a 100 percent rating from the American Conservative Union last year.

Like his father, he took a seat on the Transportation Committee.

And when Republicans took the majority in 2010, he gained his influential subcommittee chairmanship, which includes oversight of PHMSA, part of the Department of Transportation.

Shuster's tough stance on regulations is very much in the mainstream of his party and the Transportation Committee, where 19 members are freshman Republicans.

His campaign-finance reports reflect his national profile. Since taking office in 2001, he has received more than $340,000 in campaign contributions from sources involved in energy and pipelines: oil and gas companies, utility firms, natural gas trade groups, and companies involved in pipeline construction, his reports show.

Shuster said he thought PHMSA was generally effective, but last year he accused the agency of undue delays in processing permits to ship hazardous materials, including Fourth of July fireworks.