We are offering pipe fittings with ccs lr gl abs dnv. materials: stainless steel: a403-wp304. A403-wp304l. A403-wp316. A403-wp316l. A403-wp316h a403-wp347.a403-wp347h. A403-wp317. A403-wp317l. A403-wp310 a403-wp310s. A403-wp310h, a403-wp321.a403-wp321h, s31254 alloy steel: a234 wp5, a234 wp11, a234 wp12.a234 wp22.a234 wp9.a234 wp91 carbon steel: a234 wpb, a234 wpc we also can provide other specification as customer's requirement.our products are certified by ccs, abs, gl.lr, dnv ect. we would like to establish good relationship with you.