Products are manufactured according to API 11B Standards. The quality system bears ISO 9001: 2000 and API Q1 certifications.
GRADE D CARBON Designed for non-corrosive or effectively inhibited wells with moderate loads. Manufactured in 4130 Mod. Steel. GRADE D ALLOY Designed for moderate to high loads in non-corrosive or effectively inhibited wells. Manufactured in AISI 4142 steel. GRADE KD Designed for corrosive wells where inhibiting is recommended, with moderate loads. Manufactured in AISI 4720 Mod. Steel. GRADE D SPECIAL Designed for corrosive wells with high and moderate loads where inhibition is recommended. Manufactured in AISI 4330 Mod. Steel.