Trust the True Pioneer and Leader in Hot Tapping and Drilling Products

At T.D. Williamson, we developed the first tapping machine almost 60 years ago, and we have continued to make improvements in order to keep pace with ever-increasing industry demands. Today, we offer more than 13 tapping/drilling machine models, as well as a variety of cutters to cover the need for 1/4-inch to 60-inch holes in lines with pressures up to 2,460 psi.

For custom applications, we are backed by one of the largest, most experienced engineering staffs in the world. We have the expertise and technical support to design and fabricate customized equipment.  

Our products include a wide range of pipeline hot tapping and drilling products:

T101 Drilling Machine - Sizes 1/2 inch to 4 inches. Meets NACE Standard MR0175-93. Maximum working pressure is 1,480 psi (100 bar) at 100°F (38°C).

904 Drilling Machine - Sizes 1.2 inches to 4 inches. Meets NACE Standard MR0175-2002. Maximum working pressure is 2,220 psi (153 bar) at 100°F (38°C). 

TD Drilling Machines - Sizes 6 inches to 14 inches. Meets NACE Standard MR0175-93. Maximum working pressure is 740 psi (50 bar). 

T-203 Hot Tapping Machine - Sizes 4 inches to 12 inches (DN 100 through DN 300) primarily used for the installation of TDW SHORTSTOPP® plugging machines. Operates at a maximum of 740 psi (50 bar) at 100°F (38°C). Its operating temperature is from 20° F (-29° C) to 180°F (82°C) at 675 psi (46 bar). 

360 Hot Tapping Machine - Used for making tank taps to 4 inches and pipe taps to 6 inches. Its maximum working pressure is 1,480 psi (100 bar) at 100°F (38°C). Its operating temperature is from -20°F (-29°C) to 700°F (371°C) at 700 psi (48 bar) for intermittent service. Its maximum continuous rating is 350°F (177°C) at 1,025 psi (70 bar). 

660 Hot Tapping Machine - Used for making pipe and tank taps from 3 inches to 12 inches (DN 80 to DN 300). Its maximum working pressure is 1,480 psi (100 bar) at 100°F (38°C). Its operating temperature is from -20°F (-29°C) to 700°F (371°C) at 700 psi (48 bar) for intermittent service. Its maximum continuous rating is 350°F (177°C) at 1,025 psi (48 bar). 

760 Hot Tapping Machine - Used for making pipe and tank taps from 3 inches to 16 inches (DN 80 to DN 400). Its maximum working pressure is 1,480 psi (102 bar) at 100°F (38°C). Its operating temperature is from -20°F (-29°C) to 700°F (371°C) at 700 psi (48 bar) for intermittent service. Its maximum continuous rating is 350°F (177°C) at 1,025 psi (70 bar). 

860 Hot Tapping Machine - Used for making pipe and tank taps from 4 iches to 20 inches (DN 80 to DN 500). It includes an electric start, diesel power unit. Its maximum working pressure is 1,480 psi (100 bar) at 100°F (38°C). Its operating temperature is from -20°F (-9°C) to 700°F (371°C) at 700 psi (48 bar) for intermittent service. Its maximum continuous rating is 350°F (177°C) at 1,025 psi (70 bar). 

936 Hot Tapping Machine - Used for making pipe and tank taps from 12 inches to 36 inches. Its operating temperature is from 0°F (-18°C) to 180°F (82°C) at 2,220 psi (153 bar). For temperatures above 180°F (82°C), consult the factory. The 936 Tapping Machine’s unique pressure balanced system eliminates the effects of pipeline pressure, reducing operating loads on the feedscrew. The 936 Tapping Machine meets NACE standard MR0175-93. 

1200 Hot Tapping Machine - Used for making pipe and tank taps from 12 inches to 42 inches (305 mm to 1067 mm). Maxiumum working pressure is 1,480 psi (100 bar) at 100°F (38°C). Operating temperature is  from -20°F (-29°C) to 700°F (371°C) at 700 psi (48 bar) for intermittent service. Maximum continuous rating is 350°F (177°C) at 1,025 psi (70 bar). Model 1200K Tapping Machine is fitted with a ladder and platform for operator use. The 1200K Tapping Machine meets NACE standard MR0175-2002.

2400 Hot Tapping Machine - Used for making pipe and tank taps from 30 inches to 60 inches. Its operating temperature is from -20°F (-29°C) to 200°F (93°C) at 1,200 psi (82 bar). 

PS2000 PE Hot Tapping Machine - Designed to make taps into polyethylene (PE) pipe under pressure in preparation for line plugging or tying in a branch outlet. Accessories and cutters permit making taps on 2- through 8-inch PE pipes under pressure, without shutdown.