Customer COVID-19 Communication:

As a trusted partner, Dan-Loc Group is open for business, so you can perform in your business. Based on the DHS standards, Dan-Loc Group is considered an essential and critical business because we support the continued safe operations of pipelines, refineries, chemical plants and other critical manufacturing.

Read More

Call Us at 713.356.3500


product image

Dan-Loc Group has established a strict guideline of quality assurance and is ISO 9001 Registered. Our quality assurance manual is available upon request. We are also in compliance with the National Fastener Act.

Your operation can’t risk failures. You have to know that you’re getting quality products that live up to your performance requirements. Dan-Loc Group goes above and beyond to give you this level of assurance.

Dan-Loc Group has been granted approval from the American Petroleum Institute to use the API Spec 20E Monogram (license number 20E-0022), in addition to API Spec Q1 Manufacturing Certification.  These API certifications along with ISO 9001:2015 Registration show Dan-Loc Group’s continued commitment to providing the highest quality bolting and sealing products to an international customer base in the global petroleum and natural gas industry.

There are several stages that go into the manufacturing process, and Dan-Loc Group leaves nothing to chance with any of them, including the sourcing of our raw materials. All of our steel comes from mills that we know and have worked with for a long time. These mills perform vacuum degassing and controlled diameter reduction to ensure quality and make the steel cleaner and stronger. Yet, even though we have immense confidence in our suppliers, we still test our incoming material, so you can have immense confidence in our products. We perform Positive Material Identification (PMI) testing to ensure we have received what was expected and that it is manufactured to specification.

From PMI testing on, we handle every step ourselves in our Houston manufacturing facility. We use rigorous process controls in our heat-treating and roll-threading methods to attain the highest level of product reliability. Then we double check our work through exhaustive laboratory analysis. We mechanically test samples from each bolt production run to validate tensile and yield strength, elongation and reduction-of-area percentages, proper Charpy impact values for low temperature applications, and thread geometric integrity.

Our ultimate goal always is to provide the highest level of quality in everything we make and everything we do. We work to exceed industry standards in our products and to exceed customer expectations in our service. While stud bolts and ring joint gaskets may seem like simple items, they are critical components to our customers operations, and they absolutely must perform. We believe one of our greatest duties is to help our customers prevent failures, thus all of our procedures are geared toward reducing their risk, and boosting their confidence.

Dan-Loc Group - ISO 9001:2015 Reg. No 3102

Dan-Loc Group - API Spec 20E Cert No 0022

Dan-Loc Group - API Spec 20F Cert No 0026

Dan-Loc Group - API Spec Q1 Reg No 3131

Request A Quote

Ask A Question About This Product