Guidanceguidance
99-0175
Mr. C. Vleugels — Hazardous Materials Safety Interpretation
Current as of source date Government source
RegulusPipeline researchRegulusPipeline research99-0175
Page 1of Transportation US. Department Washington, D.C. 400 Seventh Street, S.W. 20590 Special Programs Research and Administration SEP 2 3 1999 Mr. C. Vleugels Ref. No. 99-0175 VanHool N.V. Bernard Van Hoolstraat 58 B-2500 Lier Koningshooikt Belgium Dear Mr. Vleugels: This is in response to your letter dated June 25, 1999, requesting clarification on determining whether your material, Sodium Sulfide, UN 1849, is a "flowable" or a "non-flowable" solid as it relates to provisions in § 173.32c (g)(2) of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171- 180). As used in § 173.32c(g)(2), a "flowable" solid is a solid material (e.g., crystal, powder, pellet, etc.) that. moves in a smooth and uninterrupted movement through the valves of a tank. Sodium Sulfide in its crystal or powder form is considered a "flowable" solid if it flows freely through the valves. A "non- flowable" solid is a solid material in a cake or other solid form that does not flow in a smooth and uninterrupted movement through the tank valves. If moisture affects your material causing clumping or other solidification that interrupts free flow or movement through the valves of the tank; your material is considered a "non-flowable" solid. I hope this answers your inquiry. Sincerely, Delmer F. Billings Chief, Standards Development Office of Hazardous Materials Standards 990175#
Page 299-0175 VANTOOL Bus and trailer manufacturers • Boothe . 171.8 Liquid Department: SB IV US Department of Transportation US. Solid Contact: Extension: 3414 Office of Hazardous Materials Standards Our reference: C. Vleugels 400 Seventh Street, S.W. ET/CV/ds - 99/297 WASHINGTON D.C. 20590 USA • For the attention of Mr. Billings Lier, the 25th June, 1999 Your letter: ref. no. 22-0062 Dear Mr. Billings . Could you please explain us how we can determine whether a cortain solid (UN 1849 - Sodium Sulfide) is a "flowable" or a "non-flowable" solid, especially in the context of provi- sion § 173.32c (g) (2). We thank you in advance for your help and remain, with kind regards VAN HOOL N.V. Reusele C. VLEUGELS TEE TARYAANS al Manager Van Hool N.V.#
This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.